XML Configuration Access Protocol

The XML Configuration Access Protocol (XCAP) is an application layer protocol that allows a client to read, write, and modify application configuration data stored in XML format on a server.

Overview

XCAP maps XML document sub-trees and element attributes to HTTP URIs, so that these components can be directly accessed by clients using HTTP protocol. An XCAP server is used by XCAP clients to store data like buddy lists and presence policy in combination with a SIP Presence server that supports PUBLISH, SUBSCRIBE and NOTIFY methods to provide a complete SIP SIMPLE server solution.

Features

The following operations are supported via XCAP protocol in a client-server interaction:

  • Retrieve an item
  • Delete an item
  • Modify an item
  • Add an item

The operations above can be executed on the following items:

  • Document
  • Element
  • Attribute

The XCAP addressing mechanism is based on XPath, that provides the ability to navigate around the XML tree.

Application usages

The following applications are provided by XCAP, by using specific auid (Application Unique Id):

  • XCAP capabilities (auid = xcap-caps).
  • Resource lists (auid = resource-lists). A resource lists application is any application that needs access to a list of resources, identified by a URI, to which operations, such as subscriptions, can be applied.
  • Presence rules (auid = pres-rules, org.openmobilealliance.pres-rules). A Presence Rules application is an application which uses authorization policies, also known as authorization rules, to specify what presence information can be given to which watchers, and when.
  • RLS services (auid = rls-services). A Resource List Server (RLS) services application is Session Initiation Protocol (SIP) application whereby a server receives SIP SUBSCRIBE requests for resource, and generates subscriptions towards the resource list.
  • PIDF manipulation (auid = pidf-manipulation). Pidf-manipulation application usage defines how XCAP is used to manipulate the contents of PIDF based presence documents.

Standards

The XCAP protocol is based on the following IETF standards:

RFC 4825, 4826, 4827, 5025


Content Disclaimer

Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.

  1. The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
  2. There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
  3. It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
  4. Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
  5. Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.