Use of Namespaces in Groovy MarkupBuilder - groovy

Question

I want have the following output:
<?xml version="1.0" encoding="UTF-8"?>
<structure:structuralDataRoot xmlns:register="http://www.test.ch/register/1" xmlns:structure="http://test.ch/structure/1" >
<structure:tester>ZH</structure:tester>
<structure:surveyYear>2001</structure:surveyYear>
<structure:surfaceData>
<structure:houseSurfaceData>
<structure:creationDate>2001-01-01</structure:creationDate>
<structure:localFarmId>
<register:houseIdCategory>token</register:houseIdCategory>
<register:houseId>token</register:houseId>
</structure:localFarmId>
</structure:houseSurfaceData>
</structure>
I can add namespace to an xml like this:
xml.records('xmlns:structure' :"http://test.ch/structure/1" ...
But how I can make a namespace prefix to an xml-element?
The only solution I found was this:
tester('xmlns:structure' :"http://test.ch/structure/1", 'ZH')
But this gives me the follwing output:
<tester xmlns:structure='http://test.ch/structure/1'>ZH</tester>
It's syntactical correct, but not nice to read when you have many nodes.

Answer 1

You can do this (not sure it's what you want though)
import groovy.xml.StreamingMarkupBuilder
import groovy.xml.XmlUtil
def xmlBuilder = new StreamingMarkupBuilder()
writer = xmlBuilder.bind {
mkp.declareNamespace( register: "http://www.test.ch/register/1" )
mkp.declareNamespace( structure: "http://test.ch/structure/1" )
'structure:structuralDataRoot' {
'structure:tester'( 'ZH' )
'structure:surveyYear'( 2001 )
'structure:surfaceData' {
'structure:houseSurfaceData' {
'structure:creationDate'( '2001-01-01' )
'structure:localFarmId' {
'register:houseIdCategory'( 'token' )
'register:houseId'( 'token' )
}
}
}
}
}
println XmlUtil.serialize( writer )
That code outputs:
<?xml version="1.0" encoding="UTF-8"?>
<structure:structuralDataRoot xmlns:register="http://www.test.ch/register/1" xmlns:structure="http://test.ch/structure/1">
<structure:tester>ZH</structure:tester>
<structure:surveyYear>2001</structure:surveyYear>
<structure:surfaceData>
<structure:houseSurfaceData>
<structure:creationDate>2001-01-01</structure:creationDate>
<structure:localFarmId>
<register:houseIdCategory>token</register:houseIdCategory>
<register:houseId>token</register:houseId>
</structure:localFarmId>
</structure:houseSurfaceData>
</structure:surfaceData>
</structure:structuralDataRoot>