CODE4Lib 2016 Python RDF Parser

This Python code demonstrates how to load a URI into a graph in memory and conduct queries on it for specific Schema.org properties.

Instructions:

The Python code assumes 2 variables by default. The first is the URI to load and query. The second is a set of Schema.org properties to query for.

Below are instructions on how to install Python on Mac and Windows as well as how to pull the GitHub Repo and use the code.

Mac:

1. Make sure Python is installed (is packaged with Mac OS X). If not install Python (https://www.python.org/downloads/)

2. From the Terminal install Pip:

   sudo easy_install pip

Windows:

1. Download Python 2.7.11 (https://www.python.org/downloads/windows/). Pip is already packaged with the install.

2. Set Python Path for Windows

   Windows 7 - http://stackoverflow.com/questions/3701646/how-to-add-to-the-pythonpath-in-windows-7 Windows 8 and 10 - http://stackoverflow.com/questions/21372637/installing-python-2-7-on-windows-8

Using the Python code:

1. Clone the GitHub project

2. Install the rdflib python library, if not already installed

   pip install rdflib

3. Install the rdflib-jsonld library, if not already installed

   pip install rdflib-jsonld

4. Run setup.py to declare install dependencies and create the parsegraph package

   python setup.py install

5. Run the parsegraph script using its default parameters for the URI to request and the predicates to select.

   parsegraph

6. You can override the default settings by including these parameters

   parsegraph -u -p

e.g.,

parsegraph -u http://www.worldcat.org/oclc/15550774 -p "name,description"

The acceptable predicates are

name - Name of the URI resource
description - Description of the URI resource
creator - Name of the creator of the URI resource (if no name, the URI for the creator will be returned)
about - Name of the subjects of the URI resource (if no name, the URI for the subject will be returned)