Subject: [xsl] XSLT program that generates XSD, the XSD has a pattern facet, the regex has curly braces, the curly braces are causing me trouble From: "Costello, Roger L. costello@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Wed, 19 Jul 2017 12:44:15 -0000 |
Hi Folks, I am writing an XSLT program that outputs an XML Schema. The generated XML Schema is to contain a simpleType, with a pattern facet. Its regex is to express: zero or more lowercase letters of the English alphabet, the left curly brace, and the right curly brace: <xs:simpleType name="Stuff"> <xs:restriction base="xs:string"> <xs:pattern value="[a-z\{\}]*" /> </xs:restriction> </xs:simpleType> The curly braces are special symbols in the regex language, so I escaped them: \{ and \} Interestingly, the curly braces are also special symbols in the XSLT language. That's causing me problems. Below is my XSLT program. It doesn't work - an error is generated because of the curly braces. Note that replacing the curly braces with their character references also failed: <xs:pattern value="[a-z\{\ }]*" /> What's the right way to do this? /Roger <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xs="http://www.w3.org/2001/XMLSchema" exclude-result-prefixes="xs" version="2.0"> <xsl:output method="xml" /> <xsl:template match="/"> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:element name="Test" type="Stuff" /> <xs:simpleType name="Stuff"> <xs:restriction base="xs:string"> <xs:pattern value="[a-z\{\}]*" /> </xs:restriction> </xs:simpleType> </xs:schema> </xsl:template> </xsl:stylesheet>
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