XQuery 3.0 Features Namespace Document

1 Introduction

This document describes the namespace http://www.w3.org/2011/xquery-features of the defined by the [XQuery 3.0] specification (Last Call Working Draft of 13 December 2011). This namespace is frequently identified by the namespace prefix qf:, but that is not a predefined namespace prefix; this namespace is not defined by an XML Schema. For updated information, please refer to the latest version of the [XQuery 3.0] specification.

This document describes the intended uses of this namespace. The W3C reserves the right to define names in this namespace in the future. [XQuery 3.0] is the only specification that may amend this namespace.

This document contains a directory of links to related resources, using RDDL (as defined in [Resource Directory Description Language (RDDL)]).

It is GRDDL-enabled (as defined in [Gleaning Resource Descriptions from Dialects of Languages (GRDDL)]), that is to say that a GRDDL-compliant processor can extract useful RDF (as defined in [Resource Description Framework (RDF): Concepts and Abstract Syntax]) representations of the information contained herein.

2 XQuery Features

[XQuery 3.0] defines two features that are used to control the use of other, optional features.

```
qf:require-feature
```
identifies features that must be enabled for the module in which the option declaration occurs; if any of these QNames corresponds to a feature that the implementation does not support, a static error is raised.
```
qf:prohibit-feature
```
identifies features that must not be enabled in the module in which the option declaration occurs; if any of these QNames corresponds to a feature that the implementation supports, it must disable that feature.

There are several optional features defined in [XQuery 3.0] for which these two features have meaning:

```
qf:schema-import
```
```
qf:schema-validation
```
```
qf:static-typing
```
```
qf:module
```
```
qf:serialization
```

3 Normative References

XQuery 3.0: XQuery 3.0 (Working Draft of 13 December 2011)

This document describes the usage of this namespace. The W3C reserves the right to define names in this namespace in the future. [XQuery 3.0] is the only specification that is permitted to amend this namespace. It may, however, be augmented by other specifications that define XQuery 3.0 extensions.

4 Non-Normative References

Resource Directory Description Language (RDDL): Resource Directory Description Language (RDDL) (4 July 2007)
Gleaning Resource Descriptions from Dialects of Languages (GRDDL): Gleaning Resource Descriptions from Dialects of Languages (GRDDL) (Recommendation of 11 September 2007)
Resource Description Framework (RDF): Concepts and Abstract Syntax: Resource Description Framework (RDF): Concepts and Abstract Syntax (Recommendation of 10 February 2004)

XQuery 3.0 Features Namespace Document

Table of Contents

1 Introduction

2 XQuery Features

3 Normative References

4 Non-Normative References