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[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: Regular expression for URI matching
 The problem is when you have a developer that produces malformed content, then compares development tool A and development tool B to decide which one he'll buy. Development tool A, being more strict, rejects the developer's content. Development tool B does not. So the developer buys the B product. This is a phenomenon that keeps marketers and product managers awake at night. Maybe the solution is to educate the developer himself ? Regards, Nicolas >-----Message d'origine----- >De : Michael Brennan [mailto:Michael_Brennan@a...] >Envoyé : jeudi 23 août 2001 21:15 >À : xml-dev@l... >Objet : RE: Regular expression for URI matching > > >Thanks for passing this along (although that regular >expression makes my >brain hurt ;)). > >It's too bad, though, that Altova is completely removing it. I >understand >the reasoning. We've all heard the admonition: be strict in >what you create, >be forgiving in what you accept. Unfortunately, the >overwhelming majority of >developers follow the path of least resistance. Forgiving web >browsers is >one reason there is so much buggy, malformed content on the >web. The typical >web developer writes a web page, brings it up in the browser, and if it >displays, they are done. If web browsers were more strict, >developers would >produce more conformant content. > >Maybe Altova should just add an optional feature that lets a >user explicitly >disable the URI checking. That way, at least, they could >accomodate their >customers without inadvertently leading naive developers down >the path of >bad practice. > >> -----Original Message----- >> From: John Cowan [mailto:cowan@m...] >> Sent: Wednesday, August 22, 2001 7:15 PM >> To: xml-dev@l... >> Subject: Regular expression for URI matching >> >> >> Alexander Falk of Altova, the XML Spy people, posted the following to >> an internal W3C mailing list. With his permission, I am reposting it >> here so that it will be archived. Anyone may use it, but this >> information is provided "as-is" with no warranties whatsoever >> regarding >> the correctness of the information. >> >> ----- Forwarded message from Alexander Falk ----- >> >> This is the Regular Expression (RE) we originally used for the anyURI >> dataype within our XML Spy product up until 4.0b2: >> >> >> (([a-zA-Z][0-9a-zA-Z+\\-\\.]*:)?/{0,2}[0-9a-zA-Z;/?:@&=+$\\.\\ >> -_!~*'()%]+)?( >> #[0-9a-zA-Z;/?:@&=+$\\.\\-_!~*'()%]+)? >> >> It was constructed according to the BNF grammar given in RFC 2396 >> (http://www.ietf.org/rfc/rfc2396.txt) and we used this RE to validate >> elements and attributes whose datatype was anyURI. >> >> However, we've found that (a) many customers actually use >> illegal URIs in >> their documents happily, (b) XML Schema Part 2 >> (http://www.w3.org/TR/xmlschema-2/#anyURI) doesn't require >> any validation of >> the contents of the anyURI dataype, and (c) most customers >> don't want us to >> validate stronger than what other processors are doing. >> >> Therefore, we are currently eliminating the anyURI checking [...] > >----------------------------------------------------------------- >The xml-dev list is sponsored by XML.org <http://www.xml.org>, an >initiative of OASIS <http://www.oasis-open.org> > >The list archives are at http://lists.xml.org/archives/xml-dev/ > >To subscribe or unsubscribe from this elist use the subscription >manager: <http://lists.xml.org/ob/adm.pl> > 
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