How do I parse namespaces from an XML file using XMLLINT and BASH

Question

Below I have an example of an Adobe XML swidtag used to track inventory. I need to parse out relevant information using xmllint in bash and output that to a new text file.

For example I would like to parse the following

swid:entitlement_required_indicator swid:product_title swid:product_version swid:name swid:numeric swid:major swid:minor swid:build swid:review 

I have tried using this, but it will not let me read the namespace

xmllint --xpath '//swid:product_version/swid:name/text()' file.xml 

I've also tried

xmllint --xpath "//*[local-name1()='product_version']/*[local-name2()='name']/text()" file.xml 

But got these errors

xmlXPathCompOpEval: function local-nameame1 not found XPath error : Unregistered function XPath error : Stack usage errror XPath evaluation failure 

Sample tag file for Creative Suite 5 The following sample is for Adobe Photoshop CS5 serialized as Creative Suite 5 Master Collection (Suite)

<?xml version="1.0" encoding="utf-8"?> <swid:software_identification_tag xsi:schemaLocation="http://standards.iso.org/iso/19770/-2/2008/schema.xsd software_identification_tag.xsd" xmlns:swid="http://standards.iso.org/iso/19770/-2/2008/schema.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <!--Mandatory Identity elements --> <swid:entitlement_required_indicator>true</swid:entitlement_required_indicator> <swid:product_title>Acrobat XI Pro</swid:product_title> <swid:product_version> <swid:name>1.0</swid:name> <swid:numeric> <swid:major>1</swid:major> <swid:minor>0</swid:minor> <swid:build>0</swid:build> <swid:review>0</swid:review> </swid:numeric> </swid:product_version> <swid:software_creator> <swid:name>Adobe Systems Incorporated</swid:name> <swid:regid>regid.1986-12.com.adobe</swid:regid> </swid:software_creator> <swid:software_licensor> <swid:name>Adobe Systems Incorporated</swid:name> <swid:regid>regid.1986-12.com.adobe</swid:regid> </swid:software_licensor> <swid:software_id> <swid:unique_id>CreativeCloud-CS6-Mac-GM-MUL</swid:unique_id> <swid:tag_creator_regid>regid.1986-12.com.adobe</swid:tag_creator_regid> </swid:software_id> <swid:tag_creator> <swid:name>Adobe Systems Incorporated</swid:name> <swid:regid>regid.1986-12.com.adobe</swid:regid> </swid:tag_creator> <!--Optional Identity elements --> <swid:license_linkage> <swid:activation_status>activated</swid:activation_status> <swid:channel_type>SUBSCRIPTION</swid:channel_type> <swid:customer_type>RETAIL</swid:customer_type> </swid:license_linkage> <swid:serial_number>909702426602037824854600</swid:serial_number> </swid:software_identification_tag> 

Answer 1

This discussion is enlightening.

At the very least, even if not ideal, you should be able to do:

xmllint --xpath "//*[local-name()='product_version']/*[local-name()='name']/text()" file.xml 

Or use xmlstarlet instead:

xmlstarlet sel -t -v //swid:product_version/swid:name file.xml 

Answer 2

Try using a here-doc. Example:

#!/bin/bash xmllint --shell file.xml <<EOF setns swid=http://standards.iso.org/iso/19770/-2/2008/schema.xsd xpath //swid:product_version/swid:name/text() EOF 

Works with later versions of xmllint that support the --xpath parameter.

Answer 3

With an older version of xmllint (which doesn't support --xpath) you can set a namespace and query more intuitively thus (but you have to grep out some additional garbage):

#!/bin/bash echo 'setns swid=http://standards.iso.org/iso/19770/-2/2008/schema.xsd cat //swid:product_version/swid:name/text()' | \ xmllint --shell file.xml | egrep -v '^(/ >| -----)' 

Answer 4

I had similar issues, reading pom.xml (a maven configuration file) in shell script for jenkins. To ensure a good result, I would do:

xmllint --xpath "//swid:software_identification_tag/*[local-name()='product_version']/*[local-name()='name']/text()" file.xml 

You don't seem to have the problem here put if your xml has that kind of additionnal content:

<swid:product_specifics> <swid:product_version> ... </swid:product_version> </swid:product_specifics> 

xmllint --xpath "//*[local-name()='product_version']/*[local-name()='name']/text()" file.xml won't work

In my situation, a pom.xml has many "version" elements, so if you want a specific one, the path should be exact, otherwise you'll get multiple values you don't want.