On 2/17/2015 3:25 PM, Procházka Lukáš Ing. - Pontex s. r. o. wrote:
Hello,
a slightly modified example:
---- t.xml
<a>
<aa number="111">AA</aa>
<ab number="222">AB</ab>
</a>
----
and the Ctx source:
---- t.mkiv
\startxmlsetups xml:T
\xmlfunction{#1}{test}
\xmlsetsetup{\xmldocument}{*}{+}
% \xmlsetsetup{\xmldocument}{*}{-} % Empties output?!
\xmlsetsetup{\xmldocument}{a/aa}{xml:*}
\xmlsetsetup{\xmldocument}{a/ab}{xml:*}
\stopxmlsetups
\startluacode
local aux = aux; if not aux then aux = {}; _G.aux = aux end
xml.functions.aa = function(t)
aux.num = t.at.number
end
\stopluacode
\startxmlsetups xml:aa
\xmlfunction{#1}{aa}
\stopxmlsetups
\startxmlsetups xml:ab
\xmlfunction{#1}{ab}
\ctxlua{context.section("New section " .. (aux.num or "??"))}
\xmlflush{#1}
\stopxmlsetups
\xmlregistersetup{xml:T}
\starttext
Hello
\xmlprocessfile{id}{t.xml}{}
\stoptext
----
Two (remaining) questions:
1)
Why the line "\xmlsetsetup{\xmldocument}{*}{-}" (try to uncomment!)
causes the whole output is empty, even if I specify another operation
for "a/ab" elements later?
My intention is to have "{*}{-}" (don't flush anything by default),
excluding elements specified later, e.g. "a/ab" (with another operation
specified);
how to achieve this?
2)
How to get "aa.number" from within "ab" element?
I believed "\xmlatt{#1/../aa}{number}" within "a/ab" will do that,
but....? How to do that?
I have a partial solution: when processing "a/aa", I save an attribute
value to a Lua variable, which I use later;
but this solution doesn't look very "clean" for me;
I'd rather find a way to access parental (first) child attributes form
within a node...
\startbuffer[demo]
<a>
<aa number="--">--</aa>
<aa number="a1">A1</aa>
<ax number="x1">X1</ab>
<ab number="b1">B1</ab>
<aa number="--">--</aa>
<aa number="a2">A2</aa>
<ax number="x2">X2</ab>
<ab number="b2">B2</ab>
<aa number="--">--</aa>
<aa number="a3">A3</aa>
<ax number="x3">X3</ab>
<ab number="b3">B3</ab>
</a>
\stopbuffer
\startxmlsetups xml:initialize
\xmlsetsetup{#1}{*}{xml:*}
\stopxmlsetups
\startxmlsetups xml:a
\xmlflush{#1}
\stopxmlsetups
\startxmlsetups xml:aa
\par
<aa>\xmlflush{#1}</aa>
\par
\stopxmlsetups
\startxmlsetups xml:ax
\par
<ax>\xmlflush{#1}</ax>
\par
\stopxmlsetups
\startxmlsetups xml:ab
\par
<ab>
\xmlflush{#1}:\space
aa: \xmlfilter{#1}{reverse-sibling::[tag() ==
'aa']/attribute('number')}\space
ax: \xmlfilter{#1}{reverse-sibling::[tag() ==
'ax']/attribute('number')}\space
</ab>
\par
\stopxmlsetups
\xmlregistersetup{xml:initialize}
\starttext
\xmlprocessbuffer{main}{demo}{}
\stoptext
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