This document describes the family of URIs having the scheme and path
http://www.w3.org/2013/collation/UCA, followed by an optional query part. The URIs in this
family are used to identify tailorings of the Unicode Collation Algorithm
defined by the Unicode Consortium. The form of these URIs (specifically, the
syntax and semantics of the query part of the URI) is defined in the
[XPath and XQuery Functions and Operators 3.1] specification
(March 2017 version).
The Unicode Collation Algorithm itself is defined in [UTS #10].
The Unicode Collation Algorithm is not to be confused with the Unicode Codepoint Collation.
These URIs identify collations. (They do not identify namespaces. There is thus no associated namespace prefix, and no associated schema.)
For updated information, please refer to the latest version of the [XPath and XQuery Functions and Operators 3.1] specification.
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.
The ASCII-Case-Insensitive collation provides the ability to compare strings for equality without distinguishing lowercase ASCII letters from their corresponding uppercase counterparts. Every implementation of XPath 2.0 and higher, and every implementation of XQuery 1.0 and higher, must support this collation. This collation is intended to provide a mechanism for comparing strings using rules that are compatible with those of HTML5. It defines equality matching of strings only; any use of this collation for sorting strings produces implementation-defined results.
XQuery and XPath Functions and Operators 3.1 (21 March 2017 version)
Resource Directory Description Language (RDDL) (4 July 2007)
Gleaning Resource Descriptions from Dialects of Languages (GRDDL) (Recommendation of 11 September 2007)
Resource Description Framework (RDF): Concepts and Abstract Syntax (Recommendation of 10 February 2004)