[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: XML design of ((a and b) or c)
I like this one too and it has the advantage that more terms can be easily added eg: <?xml version="1.0"?> <op:or xmlns:op="http://operator-ns"> <op:and> <a/> <b/> <d/> </op:and> <c/> <op:and> <a/> <f/> </op:and> </op:or> <!-- (a and b and d) or c or (a and f) --> etc now can we write an xslt that understands "and" and "or" and optimises the dom parsing like a good compiler or interpreter would ... Rick Mukul Gandhi wrote: > The first approach looks good to me. But perhaps assigning a namespace > to operator elements could be a good idea (something like below). > > <?xml version="1.0"?> > <op:or xmlns:op="http://operator-ns"> > <op:and> > <a/> > <b/> > </op:and> > <c/> > </op:or> > > On 12/12/06, Andrew Welch <andrew.j.welch@g...> wrote: >> I've just had to design some XML to model items that can have "and" >> and "or" relationships between each one. >> >> For example: >> >> (a and b) or c >> >> could be designed as: >> >> <or> >> <a> >> <and> >> <b/> >> <c/> >> </and> >> </or> >> >> another option could be to rely on position: >> >> <a> >> <and/> >> <b/> >> <or/> >> <c/> >> >> and another could be model the relationships separately somehow: >> >> <relationships> >> <rel ref="r1" type="and"> >> <ent id="a"/> >> <ent id="b"/> >> </rel> >> <rel ref="r2" type="or"> >> <ent id="r1"/> >> <ent id="c"/> >> </rel> >> </relationships> >> <a id="a"/> >> <b id="b"/> >> <c id="c"/> >> >> Each has its own advantages/drawbacks. Personally I like the first >> technique, although it can get cluttered when there are 10+ items. >> >> Are there any better ways that I'm missing? >> >> cheers >> andrew > >
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