test_match v0.1.0 TestMatch.Lib
Module for reading and writing a library of libgraph graphs.
The read_graph/1 and write_graph/2 functions allow for reading and writing
RDF graphs to the project data repository. (Default file names are provided
with the read_graph/0 and write_graph/1 forms.)
The list_graphs/0 function lists graph file names.
Some simple accessor functions are also available:
Link to this section Summary
Functions
Create @node_table and @edge_table ETS tables.
Returns a default Cypher query.
Executes cypher_query and returns a graph.
Executes cypher_query and returns a graph with properties in ETS tables.
Executes sparql_query and returns a graph.
Returns a default Lib graph file.
Returns the Lib graphs directory.
Lists Lib graphs in the Lib graph images library.
Lists Lib graphs in the Lib graphs library.
Reads a Lib graph from the Lib graphs library.
Returns a default SPARQL query.
Returns a temp Lib graph file for writing.
Writes a graph to a .png file in the Lib graph images library.
Writes a Lib graph to a file in the Lib graphs library.
Writes a Lib graph to a file in the Lib graphs library.
Link to this section Functions
create_ets_tables()
Create @node_table and @edge_table ETS tables.
cypher_query()
Returns a default Cypher query.
from_cypher(cypher_query \\ cypher_query())
Executes cypher_query and returns a graph.
from_cypher_with_properties(cypher_query \\ cypher_query())
Executes cypher_query and returns a graph with properties in ETS tables.
from_sparql(sparql_query \\ sparql_query())
Executes sparql_query and returns a graph.
graph_file()
Returns a default Lib graph file.
Examples
iex> TestMatch.Lib.graph_file()
"default.ttl"graphs_dir()
Returns the Lib graphs directory.
list_graph_images()
Lists Lib graphs in the Lib graph images library.
Examples
iex> list_graph_images()
["tony.png", "foo.png", "foo1.png"]list_graphs()
Lists Lib graphs in the Lib graphs library.
Examples
iex> list_graphs()
["tony.dot", "foo.dot", "foo1.dot"]read_graph(graph_file \\ graph_file())
Reads a Lib graph from the Lib graphs library.
Examples
iex> read_graph()
%TestMatch.Graph{
data: "<http://dbpedia.org/resource/Hello_World>\n..."
file: "default.ttl",
path: ".../test_graph/priv/rdf/graphs/default.ttl",
type: :rdf,
uri: "file:///.../test_graph/priv/rdf/graphs/default.ttl"
}
iex> read_graph("books.ttl")
%TestMatch.Graph{
data: "@prefix bibo: <http://purl.org/ontology/bibo/> \n..."
file: "books.ttl",
path: ".../test_graph/priv/rdf/graphs/books.ttl",
type: :rdf,
uri: "file:///.../test_graph/priv/rdf/graphs/books.ttl"
}sparql_query()
Returns a default SPARQL query.
temp_graph_file()
Returns a temp Lib graph file for writing.
Examples
iex> TestMatch.Lib.temp_graph_file()
"temp.ttl"to_png(graph, binary \\ :dot)
Writes a graph to a .png file in the Lib graph images library.
The layout tool used is selected by the binary argument and is one of the following atoms:
:dot− filter for drawing directed graphs:neato− filter for drawing undirected graphs:twopi− filter for radial layouts of graphs:circo− filter for circular layout of graphs:fdp− filter for drawing undirected graphs:sfdp− filter for drawing large undirected graphs:patchwork− filter for squarified tree maps:osage− filter for array-based layouts
write_graph(graph_data, graph_file \\ temp_graph_file())
Writes a Lib graph to a file in the Lib graphs library.
Examples
iex> data |> write_graph("my.dot")
%TestMatch.Graph{
data: "@prefix bibo: <http://purl.org/ontology/bibo/> \n..."
file: "my.dot",
path: "/test_graph/priv/lib/graphs/my.dot",
type: :lib,
uri: "file:///.../test_graph/priv/lib/graphs/my.dot"
}write_lib_graph(lib_graph, graph_file \\ temp_graph_file())
Writes a Lib graph to a file in the Lib graphs library.