Subject: RE: Regular expression functions (Was: Re: [xsl] comments on December F&O draft) From: "Michael Kay" <michael.h.kay@xxxxxxxxxxxx> Date: Fri, 11 Jan 2002 12:28:49 -0000 |
> I suspect that the > introduction of user-defined functions in XSLT will lead to more > functions that do this [construct and return trees], > but don't know whether people would feel it > was acceptable for a built-in function. > It's messy because of the problem that nodes have identity. You have to define whether two calls of the same function return the same tree or different trees. I guess one could say that it's explicitly implementation-defined, and no-one would worry too much about it. But it's also something you want to avoid if at all possible because constructing new trees is always expensive. Mike Kay XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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