[xquery-talk] Computed element construct

[Dave Pawson]

http://www.w3.org/TR/xquery/#id-computedElements

[111]    	CompElemConstructor 	   ::=    	"element" (QName | ("{" Expr
"}")) "{" ContentExpr? "}"
[112]    	ContentExpr 	   ::=    	Expr

So,

element elem {

for $a in (1 to 2)
return $a
}
works fine to produce

<elem>1 2</elem>

How to add an attribute to that element?

element elem {
  attribute {"attName"}{"attval"}

}
works fine to produce the empty element
with the attribute and value.

The syntax says...
(usual caveat)
that the element content is an expr

bit contraining, but

[31]    	Expr 	   ::=    	ExprSingle ("," ExprSingle)*
[32]    	ExprSingle 	   ::=    	FLWORExpr
| QuantifiedExpr
| TypeswitchExpr
| IfExpr
| OrExpr

So why can't I add the ifExpr inside the constructed element expression please?

element elem {
  attribute {"attName"}{"attval"}
for $a in (1 to 2)
return $a
}

saxon reports:

Error on line 17 column 1 of file:///myjava/xquery/data/:
  XPST0003: XQuery syntax error in #...e {"attName"}{"attval"} for $#:
    expected "}", found "for"


TIA

--
Dave Pawson
XSLT XSL-FO FAQ.
http://www.dpawson.co.uk