Support for RDF-star in rdflib

[akhil821100]

I and my team have created a module for support RDF-star in rdflib. The module iterates through the embedded triples and converts them recursively into n-triple format. Moreover, it also has support for multiple graphs as well.

[akhil821100]

Additionally, our module also has support for quad-star and n-quad triples.

[IshanMehta115]

The program uses a recursive function process_ntriple(n_triple_string, graph_name) which takes in 2 input parameters,

n_triple_string which is the n_triple in string format and

graph_name which is the name of the graph in which the triple is to be added.

The function then recursively calls itself on both the subject and object of the triple (if they are nested) and finally converts the nested n-triple into some number of non nested n-triples format.

[ghost]

There's an ongoing programme of existing RDFLib RDF Star work being done in https://github.com/RDFLib/rdflib-rdfstar