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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...
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