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xml xmlns namespace and xsi_type extractions from xml using bash

Posted on 2013-05-14
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Last Modified: 2013-05-30
Greetings.
I need to know how to pull the values from XML header information:
<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet href="http://www.accessdata.fda.gov/spl/stylesheet/spl.xsl" type="text/xsl"?>
<document xmlns="urn:hl7-org:v3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:hl7-org:v3 http://www.accessdata.fda.gov/spl/schema/spl.xsd">

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In addition, in several areas I have tags with xsi_type: attributes in it.  They do not show up in XPATH locations.  (ie. <tag xsi_type="CE" ... />

I am obligated to pull the xmlns, xmlns:xsi, xsi:schemaLocation and the specific tag (assuming I know the xpath to the tag) into a bash variable to do something with it.  Is this possible?

Thanks.
<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet href="http://www.accessdata.fda.gov/spl/stylesheet/spl.xsl" type="text/xsl"?>
<document xmlns="urn:hl7-org:v3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:hl7-org:v3 http://www.accessdata.fda.gov/spl/schema/spl.xsd">
   

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Question by:Evan Cutler
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4 Comments
 
LVL 51

Expert Comment

by:ahoffmann
ID: 39167652
which value in which header?
can you please give an example what to extract from where
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LVL 9

Author Comment

by:Evan Cutler
ID: 39168120
I need all of them.
I need to put them into a variable in BASH so I can put it somewhere.

Thanks.
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Accepted Solution

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wilcoxon earned 500 total points
ID: 39168719
xsi:type (it should be colon and not underscore) should show up in the XPath (given the right expression).  Are you sure it does not?

For parsing XML, you really want a true parser of some sort.  Since you reference XPath, I'm assuming you have access to one.  Otherwise, I would write a small script in Perl (or your language of choice) to extract the pieces you need.

That said, you can extract XML using regexes but it's tricky.
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Author Closing Comment

by:Evan Cutler
ID: 39209504
Thanks for helping.  I am still looking for answers...but I appreciate the attempt.
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