- From: Michael Kay <mike@saxonica.com>
- Date: Wed, 13 May 2009 13:34:53 +0100
- To: "'Costello, Roger L.'" <costello@mitre.org>, <xmlschema-dev@w3.org>
> BREAKS XPATH > > (Paraphrasing) By allowing the XPath in an <assert> element > to reference ancestors, cousins, and siblings it will break XPath. I don't recognize or recall the comment that you claim to be paraphrasing. > > POOR PERFORMANCE > > As I illustrate above, in XSLT the XPath expressions can > reference anywhere. It doesn't seem to impose an undue burden > on XSLT processors. So why would it impose an undue burden on > XML Schema validators? I think this is based on an assumption that the performance requirement is higher for validation than for transformation. One could question whether this assumption is well-founded - it's obviously going to vary from one user to another. > Besides, even if it did, so what? Isn't the objective to make > things easier and better for the users, not the validator > implementors? Well, it's users who benefit from improved performance, not implementors! But I agree entirely. My argument for this feature is not based on performance. Michael Kay http://www.saxonica.com/
Received on Wednesday, 13 May 2009 12:35:35 UTC