If I'm reading this right, the XQuery 1.0 spec allows zero or one values for an
attribute: http://www.w3.org/TR/xquery/#id-computedAttributes
[113]
CompAttrConstructor
::=
"attribute" (QName |
("{" Expr "}")) "{" Expr? "}"
But MarkLogic will allow me to use a computed constructor to make an attribute
that has a sequence for its value, but it doesn't look like the sequence stays
a sequence:
let $xml := <root>{attribute { "greeting" } { ("hi", "bye") }}</root>
return ($xml/@greeting/fn:data(.))[1]
=> hi bye
Except for class attributes in the xhtml namespace, which apparently can have a
sequence for their value:
declare namespace xhtml = "http://www.w3.org/1999/xhtml";;
let $xml := <xhtml:div>{attribute { "class" } { ("red", "green") }}</xhtml:div>
return ($xml/@class/fn:data(.))[1]
=> red
But if the class is not in the xhtml namespace the class attribute does not
have an sequence:
let $xml := <div>{attribute { "class" } { ("red", "green") }}</div>
return ($xml/@class/fn:data(.))[1]
=> red green
So I am guessing this is not a bug but it is intentional, and maybe works with
way so that you can easily check for class values like this:
declare namespace xhtml = "http://www.w3.org/1999/xhtml";;
let $xml := <xhtml:div>{attribute { "class" } { ("red", "green") }}</xhtml:div>
return $xml/@class = "green"
=> true
because without the xhtml namespace the answer is different:
let $xml := <div>{attribute { "class" } { ("red", "green") }}</div>
return $xml/@class = "green"
=> false
Also it looks like a space is used as a delimiter in the class value, so:
declare namespace xhtml = "http://www.w3.org/1999/xhtml";;
let $xml := <xhtml:div>{attribute { "class" } { ("red green") }}</xhtml:div>
return ($xml/@class/fn:data(.))[1]
=> red
So am I understanding this correctly? Are there other nuances? That xhtml
namespace can be a little tricky because of the nuances.
thanks,
Ryan
_______________________________________________
General mailing list
General@developer.marklogic.com
http://developer.marklogic.com/mailman/listinfo/general
