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To: NTG ConTeXt <ntg-context@ntg.nl>
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Subject: [NTG-context] position in xmlfilter
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From: Hans van der Meer via ntg-context <ntg-context@ntg.nl>
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Cc: Hans van der Meer <havdmeer@ziggo.nl>
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I do not understand the behaviour of certain function is xml processing.
My problem is finding the position of the current node, for example with =
<A><B><A> I would like to see the first <A> resulting in 1 and the =
second in 2.
The result of some experiments:

return=3D[\xmlfilter{#1}{../tag()}]		returns the parent tag, =
in this case [setup] as expected
return=3D[\xmlfilter{#1}{./tag()}]		returns the tag, in this =
case [example] as expected
return=3D[\xmlfilter{#1}{../position()}]	returns [] i.e. returns =
nothing expecting a number
return=3D[\xmlfilter{#1}{./position()}]	returns [] i.e. returns nothing =
expecting a number
return=3D[\xmlfilter{#1}{../index()}]	returns [0] expecting a number =
larger than 0
return=3D[\xmlfilter{#1}{./index()}]	returns [0] expecting a number =
larger than 0

dr. Hans van der Meer

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; =
charset=3Dus-ascii"></head><body style=3D"overflow-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;">I do not =
understand the behaviour of certain function is xml processing.<div>My =
problem is finding the position of the current node, for example with =
&lt;A&gt;&lt;B&gt;&lt;A&gt; I would like to see the first &lt;A&gt; =
resulting in 1 and the second in 2.<br><div>The result of some =
experiments:</div><div><br></div><div><div><font face=3D"Courier =
New">return=3D[\xmlfilter{#1}{../tag()}]<span class=3D"Apple-tab-span" =
style=3D"white-space: pre;">		</span>returns the parent tag, =
in this case [setup] as expected</font></div><div></div><div><font =
face=3D"Courier New">return=3D[\xmlfilter{#1}{./tag()}]<span =
class=3D"Apple-tab-span" style=3D"white-space:pre">		=
</span>returns the tag, in this case [example] as =
expected</font></div><div><div><font face=3D"Courier =
New">return=3D[\xmlfilter{#1}{../position()}]<span =
class=3D"Apple-tab-span" style=3D"white-space: pre;">	</span>returns =
[] i.e. returns nothing expecting a =
number</font></div><div></div><div><font face=3D"Courier =
New">return=3D[\xmlfilter{#1}{./position()}]<span class=3D"Apple-tab-span"=
 style=3D"white-space:pre">	</span>returns [] i.e. returns nothing =
expecting a number</font></div></div><div><div><font face=3D"Courier =
New">return=3D[\xmlfilter{#1}{../index()}]<span class=3D"Apple-tab-span" =
style=3D"white-space:pre">	</span>returns [0] expecting a number =
larger than 0</font></div></div><div><div><font face=3D"Courier =
New">return=3D[\xmlfilter{#1}{./index()}]<span class=3D"Apple-tab-span" =
style=3D"white-space: pre;">	</span>returns [0] expecting a number =
larger than 0</font></div></div><div><br></div><div>dr. Hans van der =
Meer<br></div></div></div></body></html>=

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