create dynamic xml attribute names

Question

Hi,

I'm trying to create a single xml template that can handle dynamic attribute names. The attribute name to be used is stored in another attribute. Please have a look at how i set up the xmltemplater to write the attributes names:

ROOT:

<root>

<feat>

{fme:process-features("SUB")}

</feat>

</root>

SUB:

<f>

<{fme:get-attribute("attr")}>{fme:get-attribute("value")}</{fme:get-attribute("attr")}>

</f>

Where 'attr' holds the attribute name and 'value' the value.

I get the following error:

The following error occurred near line 2, column 6 of the query:

invalid expression: syntax error, unexpected character "{"

An error occurred while parsing the 'SUB' sub-template

So clearly this is not the way to go. Is this possible in anyway or do I have to define specific SUBs (conditional) for every possible feature schema?

Thanks!

Best answer by takashi

The computed element constructor might be what you are looking for. Try this SUB expression.

<f>{
    element {fme:get-attribute("attr")} {fme:get-attribute("value")}
}</f>

See here to learn more: 3.9.3.1 Computed Element Constructors -- XQuery 3.1: An XML Query Language

takashi · Accepted Answer

Thecomputedelementconstructormightbewhatyouarelookingfor.TrythisSUBexpression.{element{fme:get-attribute("attr")}{fme:get-attribute("value")}}Seeheretolearnmore:3.9.3.1ComputedElementConstructors--XQuery3.1:AnXMLQueryLanguage

gio · Answer

you have attributes in the tags?Maybe create the template as a attribute and then add to the template?@PratschShould not the tags be created trough the template? Not via attributes?I'm no expert on this, but referred tohttps://knowledge.safe.com/articles/30940/xml-writing-with-xmltemplater.html