Regex "$" and "^" characters treated as special chars in conflict with XML
Schema spec
--------------------------------------------------------------------------------------
Key: XERCESJ-1061
URL: http://issues.apache.org/jira/browse/XERCESJ-1061
Project: Xerces2-J
Type: Bug
Components: XML Schema datatypes
Versions: 2.6.2
Environment: Test Environment: Win XP SP1, JDK v1.5.0_02, Xerces v2.6.2
(manually used; overrides any other, if packaged with the JDK)
Reporter: Darien Kindlund
Priority: Minor
Xerces rejects the following schema:
<xs:schema xmlns:xs='http://www.w3.org/2001/XMLSchema'>
<xs:element name="test">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:pattern value="$?[0-9]+\.[0-9]{2}" />
</xs:restriction>
</xs:simpleType>
</xs:element>
</xs:schema>
The code within org.apache.xerces.impl.xpath.regex.RegexParser throws a parser
exception over the use of the "$?" characters, unless the "$" character is
escaped. For example, this works:
<xs:pattern value="\$?[0-9]+\.[0-9]{2}" />
The fundamental problem is that the Xerces RegexParser code does NOT follow the
XML Schema specification, as defined by this URL:
http://www.w3.org/TR/2000/WD-xmlschema-2-20000407/#dt-metac
Specifically, the XML Schema specification does NOT give special meaning to the
"$" and "^" characters, whereas the RegexParser code seems to indicate that
these characters have the normal, standard UNIX definitions of "end-of-line"
and "start-of-line" anchors respectively.
Regards,
--
Darien Kindlund
The MITRE Corporation
InfoSec Engr / Scientist, Sr.
kindlund@xxxxxxxxx
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