Re: specifying attribute choice
"G. Ken Holman" <[email protected]>
| Newsgroups | gmane.text.xml.relaxng.general |
|---|---|
| Message-ID | <[email protected]> |
At 2004-02-09 12:00 -0500, DuCharme, Bob (LNG-CHO) wrote:
>I'm trying to figure out how I can specify that an element must have at
>least one of a certain set of attributes and may have the others as well. If
>the attributes are called x, y, and z, I could say something like ((x & y?
>&z?) | (x? & y & z?)| (x? & y? & z)), but it doesn't scale up well.
>Something like
>
> attlist.a =
> (attribute x {text},
> attribute y {text},
> attribute z {text})+
Close, Bob ... just change "," to "|".
...................... Ken
Y:\samp>type bob.rnc
start = element doc { attlist.a }
attlist.a =
(attribute x {text} |
attribute y {text} |
attribute z {text})+
Y:\samp>type bob.xml
<doc/>
Y:\samp>jing -c bob.rnc bob.xml
Y:\samp\bob.xml:1: error: unfinished element
Y:\samp>type bob2.xml
<doc y="hello"/>
Y:\samp>jing -c bob.rnc bob2.xml
Y:\samp>type bob3.xml
<doc y="hello" x="goodbye"/>
Y:\samp>jing -c bob.rnc bob3.xml
Y:\samp>
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