/ 
Catmandu-XSD-0.05
River stage zero No dependents
/ Catmandu::Fix::xpath_map

NAME

Catmandu::Fix::xpath_map - map values from a XML::LibXML::Element value to a field

SYNOPSIS

#   <mets:dmdSec ID="dmd1">
#    <mets:mdWrap MDTYPE="MODS">
#     <mets:xmlData>
#      <mods:mods xmlns:mods="http://www.loc.gov/mods/v3" ID="mods1" version="3.4">
#        <mods:titleInfo>
#         <mods:title>Alabama blues</mods:title>
#        </mods:titleInfo>
#      </mods:mods>
#     </mets:xmlData>
#    </mets:mdWrap>
#   </mets:dmdSec>

# The dmdSec.0.mdWrap.xmlData contains a XML::LibXML::Element
# Map the value of the 'mods:titleInfo/mods:title' XPath to
# a new field 'my_new_field'.
# Optionally provide one or more namespace mappings to use
xpath_map(
    dmdSec.0.mdWrap.xmlData,
    'mods:titleInfo/mods:title',
    my_new_field,
    -mods:'http://www.loc.gov/mods/v3'
)

# Result:
#
# 'my_new_field' => 'Alabama blues'

DESCRIPTION

Not all XML fields in an XML Schema can be mapped to a Perl Hash using Catmandu::XSD. Especially <any> fields in a schema, which can contain any type of XML are problematic. These fields are mapped into a blessed XML::LibXML::Element object. Using the xpath_map Fix, on can access these blessed objects and extract data from it using XPaths.

METHOD

xpath_map(xml_field, xpath, new_field [, namespace-prefix:namespace-url [,...]])

Map an XML field at xml_field to new_field using an XPath expresssion xpath.

SEE ALSO

Catmandu::Fix

AUTHOR

Patrick Hochstenbach , patrick.hochstenbach at ugent.be

LICENSE AND COPYRIGHT

This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.

See http://dev.perl.org/licenses/ for more information.