data extraction from xml file Post: 302448480

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Top Forums Shell Programming and Scripting data extraction from xml file Post 302448480 by shashi792 on Thursday 26th of August 2010 06:38:33 AM

08-26-2010

Registered User

data extraction from xml file

I have an of xml file as shown below

Code:

<?xml version='1.0' encoding='ASCII' standalone='yes' ?>
<Station Index="10264" >
   <Number Value="237895890" />
   <Position Lat="-29.5" Lon="3.5" />
   <MaxDepth Value="-4939" />
   <VeloLines Count="24">
      <VeloLine Index="0" >
         <Depth Value="0" />
         <Temperature Count="12" >
            2183
            2200
            2253
            2135
            2028
            1859
            1831
            1751
            1740
            1762
            1869
            1996
         </Temperature>
         <Salinity Count="12" >
            3577
            3586
            3583
            3582
            3575
            3580
            3576
            3575
            3566
            3567
            3561
            3569
         </Salinity>
      </VeloLine>
      <VeloLine Index="1" >
         <Depth Value="10" />
         <Temperature Count="12" >
            2155
            2188
            2254
            2128
            2020
            1854
            1810
            1739
            1732
            1749
            1850
            1964
         </Temperature>
         <Salinity Count="12" >
            3576
            3583
            3573
            3581
            3575
            3580
            3575
            3574
            3567
            3567
            3562
            3577
         </Salinity>

The temp gives me the temp for 12 months and salinity for 12 months. the file runs till 752 lines

Question : I want to extract some specific data (depth ,Temp and salinity) from the file i.e temp of 1st month (i.e first value in temp), corresponding salinity in tht month(i.e first value in salinity)

Code:

depth     temp    salinity
    0          2183     3577
    10        xxxxxx   xxxxx
    20        yyyyyy   yyyyyy
etc

to a file

My idea : Temp :- is starting from Line 10 for depth 0 and from line 41 for depth to and so on, so 31 lines diff bw them. and similarly for Salinity and similarly for depth - using awk and for loop for data extraction. Will this work ?. or any other ideas to implement this

I have attached the xml file for reference

lat_060_lon_003.xml (14.8 KB)

shashi792

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stag-autoschema

STAG-AUTOSCHEMA(1p)					User Contributed Perl Documentation				       STAG-AUTOSCHEMA(1p)

NAME

       stag-autoschema - writes the implicit stag-schema for a stag file

SYNOPSIS

	 stag-autoschema -w sxpr sample-data.xml

	 stag-autoschema -dtd sample-data.xml

DESCRIPTION

       Takes a stag compatible file (xml, sxpr, itext), or a file in any format plus a parser, and writes out the implicit underlying stag-schema

       stag-schema should look relatively self-explanatory.

       Here is an example stag-schema, shown in sxpr syntax:

	 (db
	  (person*
	   (name "s"
	   (address+
	    (address_type "s")
	    (street "s")
	    (street2? "s")
	    (city "s")
	    (zip? "s")))))

       The database db contains zero or more persons, each person has a mandatory name and at least one address.

       The cardinality mnemonics are as follows:

       +   1 or more

       ?   0 or one

       *   0 or more

       The default cardinality is 1

ARGUMENTS

       -p|parser FORMAT
	   FORMAT is one of xml, sxpr or itext, or the name of a perl module

	   xml assumed as default

       -dtd
	   exports schema as DTD

       -w|writer FORMAT
	   FORMAT is one of xml, sxpr or itext, or the name of a perl module, OR DTD

	   The default is sxpr

	   note that stag schemas exported as xml will be invalid xml, due to the use of symbols *, +, ? in the node names

LIMITATIONS

       not event based - memory usage becomes exhorbitant on large files; prepare a small sample beforehand

perl v5.10.0							    2008-12-23						       STAG-AUTOSCHEMA(1p)