Can anyone help me sort of (I don't have a running Saxon around):
1) If the element a is declared with, say, the simple
nonatomic IDREFS
type as its simpleContent
and I have an instance document with
<a> foo bar baz</a>
and that a element becomes the context node for
<value-of select="."/>
I should get as output the (one) text node with
foo bar baz
right? But really, behind the scenes, it was atomized and
re-de-atomized
:), so I assume that
<value-of select="." separator="-ostrich-"/>
should get me
foo-ostrich-bar-ostrich-baz
Correct. The detailed rules are in 5.7.2:
#Zero-length text nodes in the sequence are discarded.
#Adjacent text nodes in the sequence are merged into a single text node.
#The sequence is atomized.
#Every value in the atomized sequence is cast to a string.
#The strings within the resulting sequence are concatenated, with a
(possibly zero-length) separator inserted between successive strings.
If not, well what about:
<value-of select="./text()" />
or
<value-of select="./text()" separator="-ostrich-"/>
My _understanding_ is that they should both just output
foo bar baz
because text() doesn't atomize, but I am open for any objections.
Actually the text nodes *are* atomized, but the result of atomizing a text
node is a single string, regardless of the type annotation of the parent
element.
Note also that the rule about concatenating text nodes comes into play here:
if your input were
<a>foo<!--hey!-->bar</a>
the result would be "foobar" rather than "foo-ostrich-bar" because of the
rule that adjacent text nodes are concatenated before atomization.
document-node(schema-element(rubberduck))
node test is one bastard to analyze (I'm doing static
analysis on XSLT):
It tests not one, but tow nodes.
Are there any great dangers in converting it to
document-node()[child::schema-element(rubberduck)]
Obviously this only works when used as a step in a path expression, or as a
pattern: not for example when used in an "as" attribute.
Technically I think the rewrite is more like:
document-node()[count(child::*)=1 and count(child::text()=0) and
(child::schema-element(rubberduck))]
Michael Kay
http://www.saxonica.com/
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