forayer.input_output.from_to_rdf¶

Read and write semantic web sources.

Functions

`add_multi_value`(prev, new)	Add a value to a set or create a new set with prev and new.
`cast_to_python_type`(lit)	Casts a literal to the respective python type.
`from_rdflib`(graph[, literal_cleaning_func, ...])	Create forayer knowledge graph object from rdflib graph.
`load_from_rdf`(in_path[, ...])	Create knowledge graph object from rdf source.
`write_to_rdf`(kg, out_path, format[, prefix, ...])	Write the forayer knowledge graph to a rdf serialization format.

forayer.input_output.from_to_rdf.add_multi_value(prev, new) → Set[source]¶

Add a value to a set or create a new set with prev and new.

prev: Existing value.
new: New value, that should be added.

Set: Set containing the previous and new elements.

forayer.input_output.from_to_rdf.cast_to_python_type(lit: rdflib.term.Literal)[source]¶

Casts a literal to the respective python type.

litrdflib.term.Literal: The literal that is to be cast.

Any: The literal as the respective python object

forayer.input_output.from_to_rdf.from_rdflib(graph: rdflib.graph.Graph, literal_cleaning_func: Optional[Callable] = None, kg_name: Optional[str] = None, multi_value: Optional[Callable] = None) → forayer.knowledge_graph.kg.KG[source]¶

Create forayer knowledge graph object from rdflib graph.

graphrdflib.Graph: Rdflib graph to transform.
literal_cleaning_func: Callable: Function to preprocess literals, if None will simply cast to python types.
formatstr: Triple format (“xml”, “n3” (use for turtle), “nt” or “trix”).
kg_namestr: How to name the knowledge graph object.
multi_valueCallable: How to handle multiple attribute values for an entity, attribute name combination. Default creates a set and adds to it

KG: the transformed kg object

forayer.input_output.from_to_rdf.load_from_rdf(in_path: str, literal_cleaning_func: Optional[Callable] = None, format: Optional[str] = None, kg_name: Optional[str] = None, multi_value: Optional[Callable] = None) → forayer.knowledge_graph.kg.KG[source]¶

Create knowledge graph object from rdf source.

in_pathstr: Path of triple file.
literal_cleaning_func: Callable: Function to preprocess literals, if None will simply cast to python types.
formatstr: Triple format (“xml”, “n3” (use for turtle), “nt” or “trix”).
kg_namestr: How to name the knowledge graph object.
multi_valueCallable: How to handle multiple attribute values for an entity, attribute name combination. Default creates a set and adds to it

KG: the loaded kg object

forayer.input_output.from_to_rdf.write_to_rdf(kg: forayer.knowledge_graph.kg.KG, out_path: str, format: str, prefix: str = '', attr_mapping: Optional[dict] = None)[source]¶

Write the forayer knowledge graph to a rdf serialization format.

kgKG: The knowledge graph that will be serialized.
out_pathstr: The path where it should be serialized to.
formatstr: The desired rdf format.
prefixstr: Prefix for the entities in the graph.
attr_mappingdict: Mapping of attribute names.