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The state of the presence subscription in relation to a roster item is captured in the subscription attribute of the element. Allowable values for this attribute are. none -- the user does not have a subscription to the contact s presence information, and the contact does not have a subscription to the user s presence information to -- the user has a subscription to the contact s presence information, but the contact does not have a subscription to the user s presence information from -- the contact has a subscription to the user s presence information, but the user does not have a subscription to the contact s presence information both -- both the user and the contact have subscriptions to each other s presence information.

Each element MAY contain a name attribute, which sets the nickname to be associated with the JID, as determined by the user not the contact. The value of the name attribute is opaque. Each element MAY contain one or more child elements, for use in collecting roster items into various categories. The XML character data of the element is opaque. Business Rules. A server MUST ignore any to address on a roster setand MUST treat any roster set as applying to the sender.

For added safety, a client SHOULD check the from address of a roster push incoming IQ of type set containing a roster item to ensure that it is from a trusted source; specifically, the stanza MUST either have no from attribute i. Retrieving One s Roster on Login.implicitly from the server or have a from attribute whose value matches the user s bare JID of the form or full JID of the form ; otherwise, the client SHOULD ignore the roster push.

Upon connecting to the server and becoming an active resource, a client SHOULD request the roster before sending initial presence however, because receiving the roster may not be desirable for all resources, e.a connection with limited bandwidth, the client s request for the roster is OPTIONAL. If an available resource iqoption eu not request the roster during a session, the server MUST NOT send it presence subscriptions and associated roster updates.

Example Client requests current roster from server. At any time, a user MAY add an item to his or her roster. Example Client receives roster from server. Adding a Roster Item. Example Client adds a new item. The server MUST update the roster information in persistent storage, and also push the change out to all of the user s available resources that have requested the roster.

This roster push consists of an IQ stanza of type set from the server to the client and enables all available resources to remain in sync with the server-based roster information. Example Server 1 pushes the updated roster information to all available resources that have requested the roster and 2 replies with an IQ result to the sending resource. As required by the semantics of the IQ stanza kind as defined in XMPP CORE Saint-Andre, P.each resource that received the roster push MUST reply with an IQ stanza of type result or error.

Example Resources reply with an IQ result to the server. Updating a Roster Item. Updating an existing roster item e.changing the group is done in the same way as adding a new roster item, i.by sending the roster item in an IQ set to the server. Example User updates roster item added group. As with adding a roster item, when updating a roster item the server MUST update the roster information in persistent storage, and also initiate a roster push to all of the user s available resources that have requested the roster.

Deleting a Roster Item. At any time, a user MAY delete an item from his or her roster by sending an IQ set to the server and making sure that the value of the subscription attribute is remove a compliant server MUST ignore any other values of the subscription attribute when received from a client. Example Client removes an item. As with adding a roster item, when deleting a roster item the server MUST update the roster information in persistent storage, initiate a roster push to all of the user s available resources that have requested the roster with the subscription attribute set to a value of removeand send an IQ result to the initiating resource.

Integration of Roster Items and Presence Subscriptions. Some level of integration between roster items and presence subscriptions is normally expected by an instant messaging user regarding the user s subscriptions to and from other contacts. This section describes the level of integration that MUST be supported within XMPP instant messaging applications. There are four primary subscription states.

None -- the user does not have a subscription to the contact s presence information, and the contact does not have a subscription to the user s presence information To -- the user has a subscription to the contact s presence information, but the contact does not have a subscription to the user s presence information From -- the contact has a subscription to the user s presence information, but the user does not have a subscription to the contact s presence information Both -- both the user and the contact have subscriptions to each other s presence information i.the union of from and to.

Each of these states is reflected in the roster of both the user and the contact, thus resulting in durable subscription states. Narrative explanations of how these subscription states interact with roster items in order to complete certain defined use cases are provided in the following sub-sections. Full details regarding server and client handling of all subscription states including pending states between the primary states listed above is provided in Subscription States Subscription States.

The server MUST NOT send presence subscription requests or roster pushes to unavailable resources, nor to available resources that have not requested the roster. The from and to addresses are OPTIONAL in roster pushes; if included, their values SHOULD be the full JID of the resource for that session. A client MUST acknowledge each roster push with an IQ stanza of type result for the sake of brevity, these stanzas are not shown in the following examples but are required by the IQ semantics defined in XMPP CORE Saint-Andre, P.

User Subscribes to Contact. The process by which a user subscribes to a contact, including the interaction between roster items and subscription states, is described below. In preparation for being able to render the contact in the user s client interface and for the server to keep track of the subscription, the user s client SHOULD perform a roster set for the new roster item. This request consists of sending an IQ stanza of type set containing a element qualified by the jabber iq roster namespace, which in turn contains an element that defines the new roster item; the element MUST possess a jid attribute, MAY possess a name attribute, MUST NOT possess a subscription attribute, and MAY contain one or more child elements.

Note If the user did not create a roster item before sending the subscription request, the server MUST now create one on behalf of the user, then send a roster push to all of the user s available resources that have requested the roster, absent the name attribute and the child shown above. The user s server MUST also stamp the presence stanza of type subscribe with the user s bare JID i.as the from address if the user provided a from address set to the user s full JID, the server SHOULD remove the resource identifier.

If the contact is served by a different host than the user, the user s server MUST route the presence stanza to the contact s server for delivery to the contact this case is assumed throughout; however, if the contact is served by the same host, then the server can simply deliver the presence stanza directly. Note If the user s server receives a presence stanza of type error from the contact s server, it MUST deliver the error stanza to the user, whose client MAY determine that the error is in response to the outgoing presence stanza of type subscribe it sent previously e.by tracking an id attribute and then choose to resend the subscribe request or revert the roster to its previous state by sending a presence stanza of type unsubscribe to the contact.

Upon receiving the presence stanza of type subscribe addressed to the contact, the contact s server MUST determine if there is at least one available resource from which the contact has requested the roster. If so, it MUST deliver the subscription request to the contact if not, the contact s server MUST store the subscription request offline for delivery when this condition is next met; normally this is done by adding a roster item for the contact to the user s roster, with a state of None Pending In as defined under Subscription States Subscription Stateshowever a server SHOULD NOT push or deliver roster items in that state to the contact.

No matter when the subscription request is delivered, the contact must decide whether or not to approve it subject to the contact s configured preferences, the contact s client MAY approve or refuse the subscription request without presenting it to the contact. Here we assume the happy path that the contact approves the subscription request the alternate flow of declining the subscription request is defined in Section 8.

1 Alternate Flow Contact Declines Subscription Request. In this case, the contact s client 1 SHOULD perform a roster set specifying the desired nickname and group for the user if any ; and 2 MUST send a presence stanza of type subscribed to the user in order to approve the subscription request. Note If the contact s server receives a presence stanza of type error from the user s server, it MUST deliver the error stanza to the contact, whose client MAY determine that the error is in response to the outgoing presence stanza of type subscribed it sent previously e.by tracking an id attribute and then choose to resend the subscribed notification or revert the roster to its previous state by sending a presence stanza of type unsubscribed to the user.

If the contact is not in the user s roster with either of those states, the user s server MUST silently ignore the presence stanza of type subscribed i.it MUST NOT route it to the user, modify the user s roster, or generate a roster push to the user s available resources. If the contact is in the user s roster with either of those states, the user s server 1 MUST deliver the presence stanza of type subscribed from the contact to the user; 2 MUST initiate a roster push to all of the user s available resources that have requested the roster, containing an updated roster item for the contact with the subscription attribute set to a value of to ; and 3 MUST deliver the available presence stanza received from each of the contact s available resources to each of the user s available resources.

From the perspective of the user, there now exists a subscription to the contact s presence information; from the perspective of the contact, there now exists a subscription from the user. Alternate Flow Contact Declines Subscription Request. The above activity flow represents the happy path regarding the user s subscription request to the contact. The main alternate flow occurs if the contact refuses the user s subscription request, as described below.

If the contact wants to refuse the request, the contact s client MUST send a presence stanza of type unsubscribed to the user instead of the presence stanza of type subscribed sent in Step 6 of Section 8. 2 User Subscribes to Contact. Note If the contact s server previously added the user to the contact s roster for tracking purposes, it MUST remove the relevant item at this time.

Upon receiving the presence stanza of type unsubscribed addressed to the user, the user s server 1 MUST deliver that presence stanza to the user and 2 MUST initiate a roster push to all of the user s available resources that have requested the roster, containing an updated roster item for the contact with the subscription attribute set to a value of none and with no ask attribute. Upon receiving the presence stanza of type subscribed addressed to the user, the user s server MUST first verify that the contact is in the user s roster with either of the following states a subscription none and ask subscribe or b subscription from and ask subscribe.

As a result of this activity, the contact is now in the user s roster with a subscription state of nonewhereas the user is not in the contact s roster at all. Creating a Mutual Subscription.a subscription of type both. The user and contact can build on the happy path described above to create a mutual subscription i. If the contact wants to create a mutual subscription, the contact MUST send a subscription request to the user subject to the contact s configured preferences, the contact s client MAY send this automatically.

Note If the contact s server receives a presence stanza of type error from the user s server, it MUST deliver the error stanza to the contact, whose client MAY determine that the error is in response to the outgoing presence stanza of type subscribe it sent previously e.by tracking an id attribute and then choose to resend the subscribe request or revert the roster to its previous state by sending a presence stanza of type unsubscribe to the user. The process is described below.

Upon receiving the presence stanza of type subscribe addressed to the user, the user s server must determine if there is at least one available resource for which the user has requested the roster. No matter when the subscription request is delivered, the user must then decide whether or not to approve it subject to the user s configured preferences, the user s client MAY approve or refuse the subscription request without presenting it to the user.

1 Alternate Flow User Declines Subscription Request. If so, the user s server MUST deliver the subscription request to the user if not, it MUST store the subscription request offline for delivery when this condition is next met. Here we assume the happy path that the user approves the subscription request the alternate flow of declining the subscription request is defined in Section 8.

In this case, the user s client MUST send a presence stanza of type subscribed to the contact in order to approve the subscription request. Note If the user s server receives a presence stanza of type error from the contact s server, it MUST deliver the error stanza to the user, whose client MAY determine that the error is in response to the outgoing presence stanza of type subscribed it sent previously e.by tracking an id attribute and then choose to resend the subscription request or revert the roster to its previous state by sending a presence stanza of type unsubscribed to the contact.

Upon receiving the presence stanza of type subscribed addressed to the contact, the contact s server MUST first verify that the user is in the contact s roster with either of the following states a subscription none and ask subscribe or b subscription from and ask subscribe. If the user is not in the contact s roster with either of those states, the contact s server MUST silently ignore the presence stanza of type subscribed i. If the user is in the contact s roster with either of those states, the contact s server 1 MUST deliver the presence stanza of type subscribed from the user to the contact; 2 MUST initiate a roster push to all available resources associated with the contact that have requested the roster, containing an updated roster item for the user with the subscription attribute set to a value of both ; and 3 MUST deliver the available presence stanza received from each of the user s available resources to each of the contact s available resources.it MUST NOT route it to the contact, modify the contact s roster, or generate a roster push to the contact s available resources.

The user and the contact now have a mutual subscription to each other s presence -- i.the subscription is of type both. Alternate Flow User Declines Subscription Request. The main alternate flow occurs if the user refuses the contact s subscription request, as described below. The above activity flow represents the happy path regarding the contact s subscription request to the user. If the user wants to refuse the request, the user s client MUST send a presence stanza of type unsubscribed to the contact instead of the presence stanza of type subscribed sent in Step 3 of Section 8.

3 Creating a Mutual Subscription. As a result of this activity, there has been no change in the subscription state; i. At any time after subscribing to a contact s presence information, a user MAY unsubscribe.the contact is in the user s roster with a subscription state of to and the user is in the contact s roster with a subscription state of from.

Both possible scenarios are described below. In the first case, the user has a subscription to the contact s presence information but the contact does not have a subscription to the user s presence information i. While the XML that the user sends to make this happen is the same in all instances, the subsequent subscription state is different depending on the subscription state obtaining when the unsubscribe command is sent.

Upon receiving the presence stanza of type unsubscribedthe user SHOULD acknowledge receipt of that subscription state notification through either affirming it by sending a presence stanza of type unsubscribe to the contact or denying it by sending a presence stanza of type subscribe to the contact; this step does not necessarily affect the subscription state see Subscription States Subscription States for detailsbut instead lets the user s server know that it MUST no longer send notification of the subscription state change to the user see Section 9.the subscription is not yet mutual.

4 Server Delivery and Client Acknowledgement of Subscription Requests and State Change Notifications. If the user wants to unsubscribe from the contact s presence information, the user MUST send a presence stanza of type unsubscribe to the contact. In the second case, the user has a subscription to the contact s presence information and the contact also has a subscription to the user s presence information i.

Case 2 Unsubscribing When Subscription is Mutual.the subscription is mutual. Note Obviously this does not result in removal of the roster item from the user s roster, and the contact still has a subscription to the user s presence information. Case 1 Unsubscribing When Subscription is Not Mutual. In order to both completely cancel a mutual subscription and fully remove the roster item from the user s roster, the user SHOULD update the roster item with subscription remove as defined under Removing a Roster Item and Cancelling All Subscriptions Removing a Roster Item and Cancelling All Subscriptions.

Cancelling a Subscription. At any time after approving a subscription request from a user, a contact MAY cancel that subscription. Case 1 Cancelling When Subscription is Not Mutual. While the XML that the contact sends to make this happen is the same in all instances, the subsequent subscription state is different depending on the subscription state obtaining when the cancellation was sent. If the contact wants to cancel the user s subscription, the contact MUST send a presence stanza of type unsubscribed to the user.

Case 2 Cancelling When Subscription is Mutual. Note Obviously this does not result in removal of the roster item from the contact s roster, and the contact still has a subscription to the user s presence information. In order to both completely cancel a mutual subscription and fully remove the roster item from the contact s roster, the contact should update the roster item with subscription remove as defined under Removing a Roster Item and Cancelling All Subscriptions Removing a Roster Item and Cancelling All Subscriptions.

Removing a Roster Item and Cancelling All Subscriptions. Because there may be many steps involved in completely removing a roster item and cancelling subscriptions in both directions, the roster management protocol includes a shortcut method for doing so. The process may be initiated no matter what the current subscription state is by sending a roster set containing an item for the contact with the subscription attribute set to a value of remove.

When the user removes a contact from his or her roster by setting the subscription attribute to a value of removethe user s server 1 MUST automatically cancel any existing presence subscription between the user and the contact both to and from as appropriate ; 2 MUST remove the roster item from the user s roster and inform all of the user s available resources that have requested the roster of the roster item removal; 3 MUST inform the resource that initiated the removal of success; and 4 SHOULD send unavailable presence from all of the user s available resources to the contact.

Upon receiving the presence stanza of type unsubscribethe contact s server 1 MUST initiate a roster push to all available resources associated with the contact that have requested the roster, containing an updated roster item for the user with the subscription attribute set to a value of to if the contact is unavailable or has not requested the roster, the contact s server MUST modify the roster item and send that modified item the next time the contact requests the roster ; and 2 MUST also deliver the unsubscribe state change notification to all of the contact s available resources.

Upon receiving the presence stanza of type unsubscribedthe contact s server 1 MUST initiate a roster push to all available resources associated with the contact that have requested the roster, containing an updated roster item for the user with the subscription attribute set to a value of none if the contact is unavailable or has not requested the roster, the contact s server MUST modify the roster item and send that modified item the next time the contact requests the roster ; and 2 MUST also deliver the unsubscribe state change notification to all of the contact s available resources.

Upon receiving the presence stanza of type unavailable addressed to the contact, the contact s server MUST deliver the unavailable presence to all of the user s available resources. Note When the user removes the contact from the user s roster, the end state of the contact s roster is that the user is still in the contact s roster with a subscription state of none ; in order to completely remove the roster item for the user, the contact needs to also send a roster removal request.

Subscription States. This section provides detailed information about subscription states and server handling of subscription-related presence stanzas i.presence stanzas of type subscribesubscribedunsubscribeand unsubscribed. Defined States. There are nine possible subscription states, which are described here from the user s not contact s perspective. None contact and user are not subscribed to each other, and neither has requested a subscription from the other None Pending Out contact and user are not subscribed to each other, and user has sent contact a subscription request but contact has not replied yet None Pending In contact and user are not subscribed to each other, and contact has sent user a subscription request but user has not replied yet note contact s server SHOULD NOT push or deliver roster items in this state, but instead SHOULD wait until contact has approved subscription request from user None Pending Out In contact and user are not subscribed to each other, contact has sent user a subscription request but user has not replied yet, and user has sent contact a subscription request but contact has not replied yet To user is subscribed to contact one-way To Pending In user is subscribed to contact, and contact has sent user a subscription request but user has not replied yet From contact is subscribed to user one-way From Pending Out contact is subscribed to user, and user has sent contact a subscription request but contact has not replied yet Both user and contact are subscribed to each other two-way TOC.

Outbound presence subscription stanzas enable the user to manage his or her subscription to the contact s presence information via the subscribe and unsubscribe typesand to manage the contact s access to the user s presence information via the subscribed and unsubscribed types. Because it is possible for the user s server and the contact s server to lose synchronization regarding subscription states, the user s server MUST without exception route all outbound presence stanzas of type subscribe or unsubscribe to the contact so that the user is able to resynchronize his or her subscription to the contact s presence information if needed.

Server Handling of Outbound Presence Subscription Stanzas. The user s server SHOULD NOT route a presence stanza of type subscribed or unsubscribed to the contact if the stanza does not result in a subscription state change from the user s perspective, and MUST NOT make a state change. If the stanza results in a subscription state change, the user s server MUST route the stanza to the contact and MUST make the appropriate state change.

These rules are summarized in the following tables. Table 1 Recommended handling of outbound subscribed stanzas. Table 2 Recommended handling of outbound unsubscribed stanzas. Server Handling of Inbound Presence Subscription Stanzas. Inbound presence subscription stanzas request a subscription-related action from the user via the subscribe typeinform the user of subscription-related actions taken by the contact via the unsubscribe typeor enable the contact to manage the user s access to the contact s presence information via the subscribed and unsubscribed types.

When the user s server receives a subscription request for the user from the contact i.a presence stanza of type subscribeit MUST deliver that request to the user for approval if the user has not already granted the contact access to the user s presence information and if there is no pending inbound subscription request; however, the user s server SHOULD NOT deliver the new request if there is a pending inbound subscription request, since the previous subscription request will have been recorded.

If the user has already granted the contact access to the user s presence information, the user s server SHOULD auto-reply to an inbound presence stanza of type subscribe from the contact by sending a presence stanza of type subscribed to the contact on behalf of the user; this rule enables the contact to resynchronize the subscription state if needed.

Table 3 Recommended handling of inbound subscribe stanzas. Server SHOULD auto-reply with subscribed stanza. These rules are summarized in the following table. When the user s server receives a presence stanza of type unsubscribe for the user from the contact, if the stanza results in a subscription state change from the user s perspective then the user s server SHOULD auto-reply by sending a presence stanza of type unsubscribed to the contact on behalf of the user, MUST deliver the unsubscribe stanza to the user, and MUST change the state.

If no subscription state change results, the user s server SHOULD NOT deliver the stanza and MUST NOT change the state. Table 4 Recommended handling of inbound unsubscribe stanzas. Server SHOULD auto-reply with unsubscribed stanza. When the user s server receives a presence stanza of type subscribed for the user from the contact, it MUST NOT deliver the stanza to the user and MUST NOT change the subscription state if there is no pending outbound request for access to the contact s presence information.

If there is a pending outbound request for access to the contact s presence information and the inbound presence stanza of type subscribed results in a subscription state change, the user s server MUST deliver the stanza to the user and MUST change the subscription state. If the user already has access to the contact s presence information, the inbound presence stanza of type subscribed does not result in a subscription state change; therefore the user s server SHOULD NOT deliver the stanza to the user and MUST NOT change the subscription state.

Table 5 Recommended handling of inbound subscribed stanzas. When the user s server receives a presence stanza of type unsubscribed for the user from the contact, it MUST deliver the stanza to the user and MUST change the subscription state if there is a pending outbound request for access to the contact s presence information or if the user currently has access to the contact s presence information.

Otherwise, the user s server SHOULD NOT deliver the stanza and MUST NOT change the subscription state. Table 6 Recommended handling of inbound unsubscribed stanzas. Server Delivery and Client Acknowledgement of Subscription Requests and State Change Notifications. When a server receives an inbound presence stanza of type subscribe i.a subscription request or of type subscribedunsubscribeor unsubscribed i.a subscription state change notificationin addition to sending the appropriate roster push or updated roster when the roster is next requested by an available resourceit MUST deliver the request or notification to the intended recipient at least once.

In order to require acknowledgement, a server SHOULD send the request or notification to the recipient each time the recipient logs in, until the recipient acknowledges receipt of the notification by affirming or denying the notification, as shown in the following table. A server MAY require the recipient to acknowledge receipt of all state change notifications and MUST require acknowledgement in the case of subscription requests, i.presence stanzas of type subscribe.

Table 7 Acknowledgement of subscription state change notifications. Obviously, given the foregoing subscription state charts, some of the acknowledgement stanzas will be routed to the contact and result in subscription state changes, while others will not. However, any such stanzas MUST result in the server s no longer sending the subscription state notification to the user.

Because a user s server MUST automatically generate outbound presence stanzas of type unsubscribe and unsubscribed upon receiving a roster set with the subscription attribute set to a value of remove see Removing a Roster Item and Cancelling All Subscriptions Removing a Roster Item and Cancelling All Subscriptionsthe server MUST treat a roster remove request as equivalent to sending both of those presence stanzas for purposes of determining whether to continue sending subscription state change notifications of type subscribe or subscribed to the user.

10 of IMP REQS Day, M. Blocking Communication. Most instant messaging systems have found it necessary to implement some method for users to block communications from particular other users this is also required by sections 5. In XMPP this is done by managing one s privacy lists using the jabber iq privacy namespace. Server-side privacy lists enable successful completion of the following use cases.

Retrieving one s privacy lists. Adding, removing, and editing one s privacy lists. Setting, changing, or declining active lists.the list that is active by default. Setting, changing, or declining the default list i. Allowing or blocking messages based on JID, group, or subscription type or globally. Allowing or blocking inbound presence notifications based on JID, group, or subscription type or globally.

Allowing or blocking outbound presence notifications based on JID, group, or subscription type or globally. Allowing or blocking IQ stanzas based on JID, group, or subscription type or globally. Allowing or blocking all communications based on JID, group, or subscription type or globally. Note Presence notifications do not include presence subscriptions, only presence information that is broadcasted to entities that are subscribed to a user s presence information.

Thus this includes presence stanzas with no type attribute or of type unavailable only. A user MAY define one or more privacy lists, which are stored by the user s server. Each element contains one or more rules in the form of elements, and each element uses attributes to define a privacy rule type, a specific value to which the rule applies, the relevant action, and the place of the item in the processing order. If the type is jidthen the value attribute MUST contain a valid Jabber ID.

JIDs SHOULD be matched in the following order. only that resource matches any resource matches only that resource matches the domain itself matches, as does any user domain, domain resource, or address containing a subdomain. If the type is groupthen the value attribute SHOULD contain the name of a group in the user s roster. If a client attempts to update, create, or delete a list item with a group that is not in the user s roster, the server SHOULD return to the client an stanza error.

If the type is subscriptionthen the value attribute MUST be one of bothtofromor none as defined under Roster Syntax and Semantics Syntax and Semanticswhere none includes entities that are totally unknown to the user and therefore not in the user s roster at all. The action attribute MUST be included and its value MUST be either allow or deny. If no type attribute is included, the rule provides the fall-through case.

The order attribute MUST be included and its value MUST be a non-negative integer that is unique among all items in the list. If a client attempts to create or update a list with non-unique order values, the server Iqoption eu return to the client a stanza error. The element MAY contain one or more child elements that enable an entity to specify more granular control over which kinds of stanzas are to be blocked i.rather than blocking all stanzas.

The allowable child elements are. -- blocks incoming message stanzas -- blocks incoming IQ stanzas. Example Server sends names of privacy lists to client, preceded by active list and default list. Example Client requests a privacy list from server. Example Server sends a privacy list to client. Example Client requests another privacy list from server.

Example Server sends another privacy list to client. Example Client requests yet another privacy list from server. Example Server sends yet another privacy list to client. In this example, the user has three lists 1 publicwhich allows communications from everyone except one specific entity this is the default list ; 2 privatewhich allows communications only with contacts who have a bidirectional subscription with the user this is the active list ; and 3 specialwhich allows communications only with three specific entities.

If the user attempts to retrieve a list but a list by that name does not exist, the server MUST return an stanza error to the user. Example Client attempts to retrieve non-existent list. The user is allowed to retrieve only one list at a time. Example Client attempts to retrieve more than one list. Managing Active Lists. If the user attempts to retrieve more than one list in the same request, the server MUST return a stanza error to the user.

In order to set or change the active list currently being applied by the server, the user MUST send an IQ stanza of type set with a element qualified by the jabber iq privacy namespace that contains an empty child element possessing a name attribute whose value is set to the desired list name. Example Client requests change of active list. The server MUST activate and apply the requested list before sending the result back to the client. Example Server acknowledges success of active list change.

If the user attempts to set an active list but a list by that name does not exist, the server MUST return an stanza error to the user. Example Client attempts to set a non-existent list as active. In order to decline the use of any active list, the connected resource MUST send an empty element with no name attribute.

Example Client declines the use of active lists. Example Server acknowledges success of declining any active list. Managing the Default List. Example User requests change of default list. Example Server acknowledges success of default list change. If the user attempts to change which list is the default list but the default list is in use by at least one connected resource other than the sending resource, the server MUST return a stanza error to the sending resource.

Example Client attempts to change the default list but that list is in use by another resource. If the user attempts to set a default list but a list by that name does not exist, the server MUST return an stanza error to the user. Example Client attempts to set a non-existent list as default. In order to decline the use of a default list i.to use the domain s stanza routing rules at all timesthe user MUST send an empty element with no name attribute.

Example Client declines the use of the default list. Example Server acknowledges success of declining any default list. In order to change its default list which applies to the user as a whole, not only the sending resourcethe user MUST send an IQ stanza of type set with a element qualified by the jabber iq privacy namespace that contains an empty child element possessing a name attribute whose value is set to the desired list name.

If one connected resource attempts to decline the use of a default list for the user as a whole but the default list currently applies to at least one other connected resource, the server MUST return a error to the sending resource. Example Client attempts to decline a default list but that list is in use by another resource. In order to edit a privacy list, the user MUST send an IQ stanza of type set with a element qualified by the jabber iq privacy namespace that contains one child element possessing a name attribute whose value is set to the list name the user would like to edit.

The element MUST contain one or more elements, which specify the user s desired changes to the list by including all elements in the list not the delta. Editing a Privacy List. Example Client edits a privacy list. Example Server acknowledges success of list edit. Note The value of the order attribute for any given item is not fixed.

com item and the paris example. org item, the user s client MUST renumber the relevant items before submitting the list to the server. Thus in the foregoing example if the user would like to add 4 items between the tybalt example. The server MUST now send a privacy list push to all connected resources. Example Privacy list push on list edit. In accordance with the semantics of IQ stanzas defined in XMPP CORE Saint-Andre, P.each connected resource MUST return an IQ result to the server as well.

Example Acknowledging receipt of privacy list pushes. Adding a New Privacy List. The same protocol used to edit an existing list is used to create a new list. If the list name matches that of an existing list, the request to add a new list will overwrite the old one. Removing a Privacy List. As with list edits, the server MUST also send a privacy list push to all connected resources. In order to remove a privacy list, the user MUST send an IQ stanza of type set with a element qualified by the jabber iq privacy namespace that contains one empty child element possessing a name http://forexlibracode.site whose value is set to the list name the user would like to remove.

Example Client removes a privacy list. If a user attempts to remove a list that is currently being applied to at least one resource other than the sending resource, the server MUST return a stanza error to the user; i. Example Server acknowledges success of list removal. If the user attempts to remove a list but a list by that name does not exist, the server MUST return an stanza error to the user.

If the user attempts to remove more than one list in the same request, the server MUST return a stanza error to the user. Blocking Messages. Server-side privacy lists enable a user to block incoming messages from other entities based on the entity s JID, roster group, or subscription status or globally. Note For the sake of brevity, IQ stanzas of type result are not shown in the following examples, nor are privacy list pushes.the user MUST first set another list to active or default before attempting to remove it.

Example User blocks based on JID. As a result of creating and applying the foregoing list, the user will not receive messages from the entity with the specified JID. The following examples illustrate the protocol. Example User blocks based on roster group. As a result of creating and applying the foregoing list, the user will not receive messages from any entities in the specified roster group.

Example User blocks globally. Example User blocks based on subscription type. As a result of creating and applying the foregoing list, the user will not receive messages from any entities with the specified subscription type. As a result of creating and applying the foregoing list, the user will not receive messages from any other users. Blocking Inbound Presence Notifications. Server-side privacy lists enable a user to block incoming presence notifications from other entities based on the entity s JID, roster group, or subscription status or globally.

Note Presence notifications do not include presence subscriptions, only presence information that is broadcasted to the user because the user is currently subscribed to a contact s presence information. As a result of creating and applying the foregoing list, the user will not receive presence notifications from the entity with the specified JID. As a result of creating and applying the foregoing list, the user will not receive presence notifications from any entities in the specified roster group.

As a result of creating and applying the foregoing list, the user will not receive presence notifications from any entities with the specified subscription type. As a result of creating and applying the foregoing list, the user will not receive presence notifications from any other users. Blocking Outbound Presence Notifications. Server-side privacy lists enable a user to block outgoing presence notifications to other entities based on the entity s JID, roster group, or subscription status or globally.

Note Presence notifications do not include presence subscriptions, only presence information that is broadcasted to contacts because those contacts are currently subscribed to the user s presence information. As a result of creating and applying the foregoing list, the user will not send presence notifications to the entity with the specified JID. As a result of creating and applying the foregoing list, the user will not send presence notifications to any entities in the specified roster group.

As a result of creating and applying the foregoing list, the user will not send presence notifications to any entities with the specified subscription type. Blocking IQ Stanzas. As a result of creating and applying the foregoing list, the user will not receive IQ stanzas from the entity with the specified JID. Server-side privacy lists enable a user to block incoming IQ stanzas from other entities based on the entity s JID, roster group, or subscription status or globally.

As a result of creating and applying the foregoing list, the user will not send presence notifications to any other users. As a result of creating and applying the foregoing list, the user will not receive IQ stanzas from any entities in the specified roster group. As a result of creating and applying the foregoing list, the user will not receive IQ stanzas from any entities with the specified subscription type.

Blocking All Communication. As a result of creating and applying the foregoing list, the user will not receive IQ stanzas from any other users. Server-side privacy lists enable a user to block all stanzas from and to other entities based on the entity s JID, roster group, or subscription status or globally. Note that this includes subscription-related presence stanzas, which are excluded by Blocking Inbound Presence Notifications Blocking Inbound Presence Notifications.

As a result of creating and applying the foregoing list, the user will not receive any communications from, nor send any stanzas to, the entity with the specified JID. As a result of creating and applying the foregoing list, the user will not receive any communications from, nor send any stanzas to, any entities with the specified subscription type.

As a result of creating and applying the foregoing list, the user will not receive any communications from, nor send any stanzas to, any other users. Blocked Entity Attempts to Communicate with User. As a result of creating and applying the foregoing list, the user will not receive any communications from, nor send any stanzas to, any entities in the specified roster group. If a blocked entity attempts to send message or presence stanzas to the user, the user s server SHOULD silently drop the stanza and MUST NOT return an error to the sending entity.

If a blocked entity attempts to send an IQ stanza of type get or set to the user, the user s server MUST return to the sending entity a stanza error, since this is the standard error code sent from a client that does not understand the namespace of an IQ get or set. IQ stanzas of other types SHOULD be silently dropped by the server. Example Blocked entity attempts to send IQ get. Example Server returns error to blocked entity. Higher-Level Heuristics. When building a representation of a higher-level privacy heuristic, a client SHOULD use the simplest possible representation.

For example, the heuristic block all communications with any user not in my roster could be constructed in any of the following ways. allow communications from all JIDs in my roster i.listing each JID as a separate list itembut block communications with everyone else allow communications from any user who is in one of the groups that make up my roster i.listing each group as a separate list itembut block communications from everyone else allow communications from any user with whom I have a subscription of both or to or from i.listing each subscription value separatelybut block communications from everyone else block communications from anyone whose subscription state is none.

The final representation is the simplest and SHOULD be used; here is the XML that would be sent in this case. Basic routing and delivery rules for servers are defined in XMPP CORE Saint-Andre, P. This section defines additional rules for XMPP-compliant instant messaging and presence servers. Inbound Stanzas. If the hostname of the domain identifier portion of the JID contained in the to attribute of an inbound stanza matches a hostname of the server itself and the JID contained in the to attribute is of the form orthe server MUST first apply any privacy lists Blocking Communication that are in force, then follow the rules defined below.

If the JID is of the form and an available resource matches the full JID, the recipient s server MUST deliver the stanza to that resource. Else if the JID is of the form or and the associated user account does not exist, the recipient s server a SHOULD silently ignore the stanza i.neither deliver it nor return an error if it is a presence stanza, b MUST return a stanza error to the sender if it is an IQ stanza, and c SHOULD return a stanza error to the sender if it is a message stanza.

Else if the JID is of the form and no available resource matches the full JID, the recipient s server a SHOULD silently ignore the stanza i.neither deliver it nor return an error if it is a presence stanza, b MUST return a stanza error to the sender if it is an IQ stanza, and c SHOULD treat the stanza as if it were addressed to if it is a message stanza. Else if the JID is of the form and there is at least one available resource available for the user, the recipient s server MUST follow these rules For message stanzas, the server Iqoption eu deliver the stanza to the highest-priority available resource if the resource did not provide a value for the.

element, the server SHOULD consider it to have provided a value of zero.most recent connect time, most recent activity time, or highest availability as determined by some hierarchy of values to choose between them or MAY deliver the message to all such resources. However, the server MUST NOT deliver the stanza to an available resource with a negative priority; if the only available resource has a negative priority, the server SHOULD handle the message as if there were no available resources defined below.

If two or more available resources have the same priority, the server MAY use some other rule e. In addition, the server MUST NOT rewrite the to attribute i.it MUST leave it as rather than change it to. For presence stanzas other than those of type probethe server MUST deliver the stanza to all available resources; for presence probes, the server SHOULD reply based on the rules defined in Presence Probes Presence Probes.

For IQ stanzas, the server itself MUST reply on behalf of the user with either an IQ result or an IQ error, and MUST NOT deliver the IQ stanza to any of the available resources. Specifically, if the semantics of the qualifying namespace define a reply that the server can provide, the server MUST reply to the stanza on behalf of the user; if not, the server MUST reply with a stanza error.

Else if the JID is of the form and there are no available resources associated with the user, how the stanza is handled depends on the stanza type For presence stanzas of type subscribesubscribedunsubscribeand unsubscribedthe server MUST maintain a record of the stanza and deliver the stanza at least once i.when the user next creates an available resource ; in addition, the server MUST continue to deliver presence stanzas of type subscribe until the user either approves or denies the subscription request see also Presence Subscriptions Presence Subscriptions.

For all other presence stanzas, the server SHOULD silently ignore the stanza by not storing it for iqoption eu delivery or replying to it on behalf of the user. For message stanzas, the server MAY choose to store the stanza on behalf of the user and deliver it when the user next becomes available, or forward the message to the user via some other means e.to the user s email account. However, if offline message storage or message forwarding is not enabled, the server MUST return to the sender a stanza error.

Note Offline message storage and message forwarding are not defined in XMPP, since they are strictly a matter of implementation and service provisioning. For IQ stanzas, the server itself MUST reply on behalf of the user with either an IQ result or an IQ error. If the hostname of the domain identifier portion of the address contained in the to attribute of an outbound stanza matches a hostname of the server itself, the server MUST deliver the stanza to a local entity according the rules for Inbound Stanzas Inbound Stanzas.

Outbound Stanzas. If the hostname of the domain identifier portion of the address contained in the to attribute of an outbound stanza does not match a hostname of the server itself, the server MUST attempt to route the stanza to the foreign domain. Differences Between Jabber IM Presence Protocols and XMPP. The recommended order of actions is as follows. This section summarizes the differences that relate specifically to instant messaging and presence applications, while the corresponding section of Iqoption eu CORE Saint-Andre, P.

summarizes the differences that relate to all XMPP applications. Session Establishment. The client-to-server authentication protocol developed in the Jabber community assumed that every client is an IM client and therefore initiated an IM session upon successful authentication and resource binding, which are performed simultaneously documention of this protocol is contained in JEP 0078 Saint-Andre, P. XMPP maintains a stricter separation between core functionality and IM functionality; therefore, an IM session is not created until the client specifically requests one using the protocol defined under Session Establishment Session Establishment.

Privacy Lists. The Jabber community began to define a protocol for communications blocking privacy lists in late 2001, but that effort was deprecated once the XMPP Working Group was formed. Therefore the protocol defined under Blocking Communication Blocking Communication is the only such protocol defined for use in the Jabber community. Work specific to instant messaging and presence by the XMPP Working Group has concentrated especially on IM session establishment and communication blocking privacy lists ; the session establishment protocol was mainly developed by Rob Norris and Joe Hildebrand, and the privacy lists protocol was originally contributed by Peter Millard.

Although it is difficult to provide a complete list, the following individuals were particularly helpful in defining the protocols or in commenting on the specifications in this memo Thomas Charron, Richard Dobson, Schuyler Heath, Jonathan Hogg, Craig Kaes, Jacek Konieczny, Lisa Dusseault, Alexey Melnikov, Keith Minkler, Julian Missig, Pete Resnick, Marshall Rose, Jean-Louis Seguineau, Alexey Shchepin, Iain Shigeoka, and David Waite.

Embarcadero uses cookies to ensure we give you the best experience on our website. By using our website you consent to all cookies in accordance with our Privacy Statement. I m running developer edition on Windows XP Professional 9. 00 SP2 Developer Edition. OS is autopatched via corporate policy and I saw some patches go in last week.

This machine is also a hand-me-down so I don t have a clean install of the databases on the machine but I am local admin. So, starting last week after a forced remote reboot also a policy I noticed a few of the databases didn t start back up. Friday however I know I shut my machine down nicely and this morning when I booted up, I was in the same state I was last Wenesday.

I chalked it up to the hard shutdown and went along my merry way. 7 of the 18 databases on my machine came up with. FCB pen Operating system error 32 The process cannot access the file because it is being used by another process. occurred while creating or opening file C Program Files Microsoft SQL Server MSSQL. Diagnose and correct the operating system error, and retry the operation. and it also logs FCB pen failed Could not open file C Program Files Microsoft SQL Server MSSQL.

mdf for file number 1. OS error 32 The process cannot access the file because it is being used by another process. I ve caught references to the auto close feature being a possible culprit, no dice as the databases in question are set to False. Recovery mode varies on the databases from Simple to Full. If I cycle the SQL Server service, whatever transient issue it was having with those files is gone.

As much as I d love to disable the virus scanner, network security would not be amused. Nothing s set to read only or archive as I ve caught on other forums as possible gremlins. The data and log files appear to have the same permissions as unaffected database files. I have sufficient disk space and the databases are set for unrestricted growth. Any thoughts on what I could look at. If it was everything coming up in RECOVERY_PENDING it s make more sense to me than a hit or miss type of thing I m experiencing now.

It seems that Sql Server is unable to access the database files at startup. could you pls once again check the permissions and provide modify privilege to the folder containing database files to the startup account. also ensure that antivirus is not accessing these files. I am having this same problem; a sequence of errors appears in the error log see below. There are no other processes accessing the file s. I even turned anti-virus off for a moment to try to restart.

I even tried DELETING all the ERRORLOG files letting it re-create them itself. Same result. All files folders in the path are NOT read-only. Also of note I d had no problems with this installation before now--it used to start just fine--but I just COPIED the MSSQL LOG and MSSQL Data folders to an alternate location outside the Program files path, which is--IMNSHO--a stupid default, for many reasonsand set the startup parameters accordingly which are obviously correct to some degree, because it IS looking in the correct location for these files based on the info in the error log.

Thanks in advance for any help. error sequence in error log. 2008-07-01 21 14 08. 90 spid5s Starting up database master. 2008-07-01 21 14 09. 20 spid5s Error 17207, Severity 16, State 1. 20 spid5s FCB pen Operating system error 32 The process cannot access the file because it is being used by another process. occurred while creating or opening file C Data files HEAR MSSQL LOG ERRORLOG. 20 spid5s Error 17204, Severity 16, State 1. 20 spid5s FCB pen failed Could not open file C Data files HEAR MSSQL LOG ERRORLOG for file number 2.

20 spid5s Error 5120, Severity 16, State 101. 20 spid5s Unable to open the physical file C Data files HEAR MSSQL LOG ERRORLOG. Operating system error 32 32 The process cannot access the file because it is being used by another process. More info In my log_. trc file, I get these under the ErrorLog EventClass. Configuration option Agent XPs changed from 1 to 0. Configuration option show advanced options changed from 1 to 0.

Maybe this is the root of the problem although, if so, the messages in ERRORLOG are misleading, or--at best--simply not very informative --but how does one Run the RECONFIGURE statement. Make sure mdf and ldf files are excluded from antivirus scanning. Do you have any startup procedures that will do something on those db s. If you still receive that error you can manually attach the database using sp_attach_db procedure or through GUI. Try manual way of attaching the db and let me know whether you are able to bring your db online.

I hope Agent Xp s is not related with this error. Had similar issue and was able to fix the issue by adding the Log On account service account under which our sql server 2k5 is running under - to the root folder SQL2005 typically the path is as D SQL2005 MSSQL. This issue typically occurs if the locations for the data and log files were changed since the intial sql installations and the required permissions on the intial folders are not carried on to the new folders.

Proposed as answer by Dileep Gonti Wednesday, May 12, 2010 7 10 PM. I am experiencing the same problem with a SQL 2005 Express server. What permissions should the Log On Account have to the root SQL2005 folder. i do have same problem. can u tell me what ar eteh permissions should have that service acnt. Rest would start fine. Whenever I restart the server, 3 out of about 10 databases would not start.

SQL Log would show the OS file Access Error for these 3 databases mdf files. Finally I was able to resolve the problem. I had SQL 2000 and SQL 2005 both running on my server. On both these I had 3 common database names which were hence not starting. SQL 2000 starts before SQL 2005 and hence it would not allow SQL 2005 to open the 3 databases which were common between the two and thus giving File Access Error.

In Windows Task Manager under the Processes Tab, check if you have 2 instances of Sqlserver. exe running. Then you probably have the same problem as mine. Switch off one of the instances i. SQL 2000 or SQL 2005 or some other version of SQL which ever you are not using from auto starting on reboot and your problem should be resolved. When this happens try to find out who hs taken the lock on the file. Open it in the menuselect find Find handle or DLL copy the complete filename with path for example C Program Files Microsoft SQL Server MSSQL.

mdf and you wil see who has taken the lock on the file handle. Most probably it might be an anti-virus or a 3rd party too to monitor SQL or backup SQL databases. Hello all, I am running into an interesting scenario on my desktop. Abhay Chaudhary OCP 9i, MCTS MCITP SQL Server 2005, 2008, 2005 BI ms-abhay. I have a similar problem with SQL 2008 SP2 and the lock is from SQL itself. Moreover on that db every 1 hour a dbcc checkdb is run without being in any maintenance plan. I have a maintenance plan that every 1 hour backups then transaction log and it seems that sometimes something goes wrong and the file becomes locked.

There is no problem with the Rights and Installations and all this things. mdf files and. ldf file that you have outside C Program Files Microsoft SQL Server MSSQL. There is problem with path you choose for. please search the. then you can easily attach and detach files. 1 MSSQL Data location for same database you want to attach. Click on a topic below or scroll down the page to browse all Connect IQ App help topics. Connect IQ App Help. Help Topics. Below are common error messages you may receive when using the Final Surge Connect IQ App.

Compatible Garmin Devices The Final Surge Garmin IQ app currently works on the following devices Forerunner Series - 245, 245 Music, 645, 645 Music, 735XT, 935, 945 Fenix Series - 5, 5S, 5S Plus, 5X, 5X Plus, Chronos MARQ Series - MARQ Athlete Edge Series - 520, 520 Plus, 530, 820, 830, 1000, 1030, 1030 Bontrager will not work with Edge Explore Series as they do not support structured workouts Why is the Forerunner 230 235 not supported. The Final Surge Connect IQ app is built using the Connect IQ 2.

The Forerunner 230 235 only supports Connect IQ 1. Although the 230 235 are some of Garmin s most popular watches, they are not compatible with their newer versions of Connect IQ. Unfortunately, this version of Connect IQ does not support most of the features that the Final Surge Connect IQ app must use to deliver workouts to our athletes. Downloading Workouts to the Forerunner 230 235 Although the Final Surge Connect IQ app is not compatible with the Forerunner 230 235, you can still download and use workouts from Final Surge on your device.

You will need to use the manual file download option through the Final Surge web platform, and then place the files on your device in the WORKOUTS folder you must plug your device into a computer via USB.

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