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".
