XQuery/Displaying Lists
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< XQuery
Contents |
[edit] Motivation
You have a list of items in an XML structure and you want to display a comma separated list of the values in an output string.
[edit] Method
XQuery provides the string-join() function that will take a sequence of items and a separator string and create and output string with the separator between each of the items. The format of the function is: string-join(nodeset, separator) where nodeset is a list of nodes and separator the string that you would like to separate the values with.
[edit] Sample Program
xquery version "1.0";
let $tags :=
<tags>
<tag>a</tag>
<tag>b</tag>
<tag>c</tag>
<tag>d</tag>
</tags>
return
<results>
<comma-separated-values>{
string-join($tags/tag, ',')
}</comma-separated-values>
</results>
[edit] Output
<results> <comma-separated-values>a,b,c,d</comma-separated-values> </results>
[edit] Discussion
The string-join function takes two arguments, the first is the sequence of strings to be joined and the second is the separator.