Commented: (XERCESJ-1061) Regex "$ " and "^ " characters treated as special 2006-09-26 - By Chris Carman (JIRA)
[ http://issues.apache.org/jira/browse/XERCESJ-1061?page=comments#action
_12438015 ]
Chris Carman commented on XERCESJ-1061:
---------------------------------------
Ok. This statement has more lines in it than the fix... Is there a way I can
avoid this in future?
a) Name: Chris Carman
Employer: not applicable, done on my own time
b) Are you the author of the code being contributed? Yes.
c) Do you have the right to grant the copyright and patent licenses for the
contribution that are set forth in the ASF v.2.0 license (http://www.apache.org
/licenses/LICENSE-2.0)? Yes.
d) Does your employer have any rights to code that you have written, for
example, through your contract for employment?
Not applicable, done on my own time
e) Are you aware of any third-party licenses or other restrictions (such as
related patents or trademarks) that could apply to your contribution? No.
> Regex "$" and "^" characters treated as special chars in conflict with XML
Schema spec
> -----------------------------------------------------------------------------
---------
>
> Key: XERCESJ-1061
> URL: http://issues.apache.org/jira/browse/XERCESJ-1061
> Project: Xerces2-J
> Issue Type: Bug
> Components: XML Schema datatypes
> Affects Versions: 2.6.2
> Environment: Test Environment: Win XP SP1, JDK v1.5.0_02, Xerces v2.6
.2 (manually used; overrides any other, if packaged with the JDK)
> Reporter: Darien Kindlund
> Priority: Minor
> Attachments: RegexParser.diff, regexparser.java
>
>
> Xerces rejects the following schema:
> <xs:schema xmlns:xs='http://www.w3.org/2001/XMLSchema'>
> <xs:element name="test">
> <xs:simpleType>
> <xs:restriction base="xs:string">
> <xs:pattern value="$?[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@(protected)
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