__init__.py 文件源码

def rdf_from_sources(self, names, outputFormat = "turtle", rdfOutput = False) :
        """
        Extract and RDF graph from a list of RDFa sources and serialize them in one graph. The sources are parsed, the RDF
        extracted, and serialization is done in the specified format.
        @param names: list of sources, each can be a URI, a file name, or a file-like object
        @keyword outputFormat: serialization format. Can be one of "turtle", "n3", "xml", "pretty-xml", "nt". "xml", "pretty-xml", "json" or "json-ld". "turtle" and "n3", "xml" and "pretty-xml", and "json" and "json-ld" are synonyms, respectively. Note that the JSON-LD serialization works with RDFLib 3.* only.
        @keyword rdfOutput: controls what happens in case an exception is raised. If the value is False, the caller is responsible handling it; otherwise a graph is returned with an error message included in the processor graph
        @type rdfOutput: boolean
        @return: a serialized RDF Graph
        @rtype: string
        """
        # This is better because it gives access to the various, non-standard serializations
        # If it does not work because the extra are not installed, fall back to the standard
        # rdlib distribution...
        try :
            from pyRdfaExtras import MyGraph
            graph = MyGraph()
        except :
            graph = Graph()

        # graph.bind("xsd", Namespace('http://www.w3.org/2001/XMLSchema#'))
        # the value of rdfOutput determines the reaction on exceptions...
        for name in names :
            self.graph_from_source(name, graph, rdfOutput)
        retval = graph.serialize(format=outputFormat)
        return retval