RE: Side-effects, state, internal references
> -----Original Message----- > From: Norman Walsh [mailto:ndw@xxxxxxxxxx] > Sent: Thursday, April 16, 1998 11:47 AM > | One solution might be to build counting behavior directly into the flow > | objects, such as the HTML <OL> provides. A more general solution would be > | for XSL to provide counting functions relative to the output tree, e.g. > | flowObjectChildNumber(). > > Those are both possibilities, but it's also possible to simply > calculate the number correctly from the source grove. After > all, if your stylesheet is doing the reordering, it knows what > reordering it's doing, right? ;-) I challenge you (in the friendliest way possible :-)) to solve the problem originally solved in this thread using source-level numbering mechanisms. I feel confident that while it is possible, it will be pretty involved, probably requiring a lot of tree walking from script. Or alternatively how would you do this correctly? Given <A> <B level="1">first level 1 B</B> <B level="2">first level 2 B</B> <B level="1">second level 1 B</B> <B level="1">third level 1 B</B> <B level="2">second level 2 B</B> </A> I would like this output (the numbers are generated): 1) first level 1 B 2) second level 1 B 3) third level 1 B In other words, I am filtering out level="2". This is intended to be a simple example that shows the general problem of combining numbering with filtering, reordering or sorting, all of which I expect to be common (nearly ubiquitous) operations on XML data, and have useful application to XML documents as well. > In the reverse case, the proper number for an element in the list > is (LENGTH_LIST - CHILD_NUMBER + 1). > I've never written a DSSSL stylesheet where I felt that I needed > either a flow object that could do enumeration automatically or > the ability to count sosofos. Which isn't to say that either or > both of those features might not be useful. Have you come across this situation in your stylesheets? I.e. combining numbering with filtering, reordering or sorting? XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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