[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

RE: Schema Regular Expression which subtracts characters

• From: Priscilla Walmsley <priscilla@w...>
• To: "'Roger L. Costello'" <costello@m...>, xml-dev@l...
• Date: Mon, 02 Jul 2001 15:36:28 -0400

Roger,

You have to put the subtraction inside the character class expression.  Try:

[a-zA-Z-[ol]]+



Hope that helps,

Priscilla Walmsley
Vitria Technology

-----Original Message-----
From: Roger L. Costello [mailto:costello@m...]
Sent: Monday, July 02, 2001 3:02 PM
To: xml-dev@l...
Cc: costello@m...
Subject: Schema Regular Expression which subtracts characters



Problem: create an XML Schema regular expression which produces strings
with the characters a-z, A-Z minus the two characters o ("oh") and l
("el").

Examples.
   The regular expression should accept these strings:

         quick, hum, trade

   It should reject these strings:

         john, family  (john contains "o", and
                        family contains "l")

Below is my regular expression.  It uses the "character class
substraction" capability from the XML Datatype's spec to subtract-out
the two undesired characters.  Here is the regular expression:

    ([a-zA-Z]+)-[ol]

"All the characters a-z and A-Z, one or more times, minus the two
characters o, and l."

Is this correct?  I tried it out with xerces 1.4.1 and also with XML Spy
1.4b and both bombed.  Here's an error message from xerces:

[Error] test.xml:6:26: Datatype error: Value 'quick' does not match
regular expression facet '([a-xA-Z]+)-[ol]'

Perhaps I am using the "character class substraction" capability
incorrectly?  Can someone tell me where I err?   /Roger


------------------------------------------------------------------
The xml-dev list is sponsored by XML.org, an initiative of OASIS
<http://www.oasis-open.org>

The list archives are at http://lists.xml.org/archives/xml-dev/

To unsubscribe from this elist send a message with the single word
"unsubscribe" in the body to: xml-dev-request@l...

• References:
  • Schema Regular Expression which subtracts characters
    • From: "Roger L. Costello" <costello@m...>

• Prev by Date: Re: Problems running Topologi Schematron
• Next by Date: xml question regarding document comparing
• Previous by thread: Schema Regular Expression which subtracts characters
• Next by thread: xml question regarding document comparing
• Index(es):
  • Date
  • Thread