W3C Last Call Working Draft: XQuery Update Facility

W3C announced that members of the XML Query Working Group have published
a Last Call Working Draft for the XQuery Update Facility 1.0. Comments
are welcome through 31-October-2007. The specification's "Requirements"
and and "Use Cases" were also published as updated Working Drafts. The
XQuery Update Facility document defines the syntax and semantics of an
extension to XQuery 1.0; this language extension is designed to meet
the requirements for updating instances of the "XQuery 1.0 and XPath 2.0
Data Model (XDM)." XML Query can perform searches, queries and joins
over collections of XDM instances such as documents or databases. Sample
usage scenarios for update: (1) Updating persistent XML stores: Modify
XML in persistent XML stores, including native XML databases, XML files
stored on a file system, or XML stored in SQL databases. (2) Modify XML
messages: Modify XML messages to change status and add information
created while processing the message. (3) Add to existing XML document:
Add new data to an existing XML document; for instance, add a new entry
to a BLOG or a data log. (4) Updating XML registries: Perform updates
on configuration files, user profiles, or administrative logs represented
in XML. (5) Creating edited copies: Create a new copy of an XML document
or subtree that differs from the original in the way specified by the
update. For instance, updates could be used to modify a web message in
order to add new information and change headers to reflect the modified
status. (6) Modifying XML views: Modifying XML views of non-XML sources,
such as a SQL/XML view of a SQL database. Since the last version of this
document, several significant changes have been made. CHECK HERE See also the Use Cases: USE CASES