urnparse

Python library for generating and parsing RFC 8141 compliant uniform resource names (URN).

Installation

To use this library in your project, install it with pip

pip install urnparse

Usage

Create URN object from RFC 8141 formatted string

To validate a given URN string against the RFC 8141 specification and construct an URN object from it, use the URN8141.from_string() method:

from urnparse import URN8141

urn_string = 'urn:example:example.org:resources:'+\
             'example%20resource?+res1=a'+\
             '?=param1=test&param2=test2#example.org'

urn = URN8141.from_string(urn_string)

You can then access the specific URN components:

print(urn.namespace_id)
# example
print(urn.specific_string.decoded)
# example.org:resources:example resource
print(urn.specific_string.parts)
# ['example.org', 'resources', 'example resource']
print(urn.rqf_component.resolution)
# {'res1': 'a'}
print(urn.rqf_component.query)
# {'param1': 'test', 'param2': 'test2'}
print(urn.rqf_component.fragment)
# example.org

Create URN string from component objects

To create an RFC 8141 formatted URN string for a certain resource, construct the URN object from the following components:

from urnparse import URN8141, NSIdentifier, NSSString, RQFComponent

nid = NSIdentifier('example')
nss = NSSString('example.org:resources:example%20resource', encoded=True)
rqf = RQFComponent(resolution_string='res1=a',
                   query_string='param1=test&param2=test2',
                   fragment='example.org')

urn = URN8141(nid=nid, nss=nss, rqf=rqf)

print(urn)
# urn:example:example.org:resources:example%20resource?+res1=a?=param1=test&param2=test2#example.org