Class Graph
In: lib/basicrdf.rb
lib/RDF4R/pastiche.rb
Parent: Object

same again re ../../lib/basicrdf.rb

Methods

ask   default   getBlank   getLiteral   getResource   load   new   ns   objects   predicates   reg_xmlns   size   statements   subjects   tell   tell_all   toDotGraph   toNtriples   toSQL   toSQLInserts  

Included Modules

RDF4R::Pastiche::SWAP

Public Class methods

load(uri, base_uri='', error_handlers=[])

Starting to ape the Cwm API (well, method name anyway)

Public Instance methods

ask(query)

Graph.ask

Basic query method for our RDF graph. passed a (template) statement w/ nils …and returns a graph (which we can probe with subjects(), predicates() etc

Notes: this is all pretty inefficient, creating new graphs all over the shop when we needn‘t, new statements etc etc. todo: change @fp and @bp to store refs to statements not nodes 

      ...and think about how we can return sub-graph matches

without having to go index them. maybe do indexing on demand? (see also tell()

getResource(content)

nodes that know… (about a graph)

objects()

return all the sharp ends of the arcs in this graph

predicates()

return all the label nodes for the arcs in this graph

reg_xmlns(uri, prefix)

XML Namespace registration

subjects()

return all the blunt ends of the arcs in this graph

tell( statement )

tell the graph something (add and index a statement)

tell_all( statements )

Add a bunch of statements (merge into tell() maybe?)

toDotGraph()

A simple dump to the Dot format used by GraphViz, www.graphviz.org/

[Validate]