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1 Introduction 1.1 Terminology 2 Extensions to XQuery 1.0 2.1 Extensions to the Processing Model 2.2 Extensions to the Prolog 2.2.1 Revalidation Declaration 2.2.2 Variable Declaration 2.2.3 Function Declaration 2.3 Extensions to the Static Context 2.4 New Kinds of Expressions 2.4.1 Insert 2.4.2 Delete 2.4.3 Replace 2.4.3.1 Replacing a Node 2.4.3.2 Replacing the Value of a Node 2.4.4 Rename 2.4.5 Transform 2.4.6 Compatibility of Updating Expressions 2.5 Extensions to Existing Expressions 2.5.1 FLWOR Expression 2.5.2 Typeswitch Expression 2.5.3 Conditional Expression 2.5.4 Comma Expression 2.5.5 Parenthesized Expression 2.5.6 Function Call 2.5.7 Other Expressions 2.6 Extensions to Built-in Function Library 2.6.1 fn:put 3 Update Operations 3.1 Update Primitives 3.1.1 upd:insert Before 3.1.2 upd:insert After 3.1.3 upd:insert Into 3.1.4 upd:insert Into As First 3.1.5 upd:insert Into As Last 3.1.6 upd:insert Attributes 3.1.7 upd:delete 3.1.8 upd:replace Node 3.1.9 upd:replace Value 3.1.10 upd:replace Element Content 3.1.11 upd:rename 3.1.12 upd:put 3.2 Update Routines 3.2.1 upd:merge Updates 3.2.2 upd:apply Updates 3.2.3 upd:revalidate 3.2.4 upd:remove Type 3.2.5 upd:set To Untyped 3.2.6 upd:propagate Namespace 4 Static Typing Feature 4.1 Overview and notations 4.2 Change to Static Typing Rules of XQuery 1.0 4.3 Core Grammar 4.4 XQuery Update Facility 1.0 Prolog 4.5 XQuery Update Facility 1.0 Expressions 4.5.1 Insert 4.5.2 Delete 4.5.3 Replace 4.5.4 Rename 4.5.5 Transform 4.5.6 Examples 5 Conformance 5.1 Minimal Conformance 5.2 Optional Features 5.2.1 Update Facility Static Typing Feature 6 XQuery X Conformance A EBNF for XQuery 1.0 Grammar with Update extensions A.1 Terminal Symbols B Implementation-Defined Items C References C.1 Normative References C.2 Non-normative References D Error Conditions D.1 New Error Codes D.2 Amendments to Existing Error Codes E XML Syntax (XQuery X) for XQuery Update Facility 1.0 E.1 Schema E.2 Stylesheet E.3 Example E.3.1 XQuery Representation E.3.2 XQuery X Representation E.3.3 Transformed XQuery Representation F Glossary (Non-Normative) G Rationale for Precedence of Update Primitives (Non-Normative) H Revision Log (Non-Normative) This document defines the syntax and semantics of an extension to [XQuery 1.0] called the XQuery Update Facility 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], as defined in [XQuery Update Facility 1.0 Requirements].

[Definition: A revalidation declaration sets the revalidation mode in the static context, overriding any implementation-defined default.] If a Prolog contains more than one revalidation declaration, a static error is raised [err: XUST0003].

In XQuery 1.0, an expression never modifies the state of an existing node; however, constructor expressions create new nodes with new node identities.

XQuery Update Facility 1.0 introduces a new category of expression called an updating expression, which can potentially modify the state of an existing node.

The extensions to XQuery 1.0 provided by XQuery Update Facility 1.0 may be characterized as follows: [Definition: A snapshot is a scope within which expressions are evaluated with respect to a fixed XDM instance and updates are held pending.] A snapshot is terminated by invocation of the upd:apply Updates operation.

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