min-non-empty-string : min « XQuery « XML

1. XML
2. XQuery
3. min

min-non-empty-string

File: Data.xml

<inventory id="inv0001" date="2008-12-19" loc="USA">
  <car model="A" id="0001" quantity="1" color="navy"/>
  <car model="B" id="0002" quantity="1"/>
  <car model="B" id="0003" quantity="2"/>
  <car model="C" id="0004" quantity="1" color="white"/>
  <car model="C" id="0004" quantity="1" color="gray"/>
  <car model="A" id="0001" quantity="1" color="black"/>
</inventory>




File: Query.xquery

declare namespace functx = "http://www.java2s.com";
declare function functx:min-non-empty-string
($stringSeq as xs:string*) as xs:string? {
   min($stringSeq[. != ''])
};

(: Example call :)
functx:min-non-empty-string(doc("Data.xml")//car/@model)

Output:

<?xml version="1.0" encoding="UTF-8"?>A

 

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