RDF Query languages
This directory contains the implementation for standard RDF query languages: SPARQL en SeRQL.
Prolog files
jena_properties.pl | ||
|---|---|---|
| rdf_html.pl -- Write query-results as HTML table. | ||
| write_graph/4 | Write an RDF result-graph as an HTML table, where resources are links to the ClioPatria local view. | |
| write_table/4 | Write a result-table in human-readable HTML format. | |
| rdf_io.pl | ||
| get_triples/3 | Read triples according to the option data_format. | |
| get_triples/4 | Hook to read triples into a list of rdf(S,P,O) for a given Format. | |
| write_graph/2 | Write a graph, represented as a list of rdf(S,P,O) triples. | |
| write_graph/4 | Hook for write_graph/2. | |
| write_table/2 | Write a result-table in the specified format. | |
| write_table/4 | Hook for write_table/2. | |
| rdf_turtle_io.pl -- Write query-result graphs as Turtle | ||
| write_graph/4 | Write an RDF result-graph as an HTML table, where resources are links to the ClioPatria local view. | |
| rdfql_runtime.pl -- SPARQL/SeRQL runtime support predicates | ||
| rdfql_bind_null/1 | True if all elements in List unify with $null$. | |
| rdfql_carthesian/1 | Bags is a list of independent goals. | |
| rdfql_cond_bind_null/1 | Bind variables in List to our NULL-representation, which is $null$. | |
| rdfql_triple_in/2 | True when Triple is an rdf(S,P,O) element in Triples that does not contain NULL. | |
| rdfql_util.pl | ||
| entailment_module/2 | Find the Prolog module implementing the entailment rules for a semantic web language. | |
| select_results/6 | Calls select_results/8 using Group=[] and Having=true. | |
| select_results/9 | Select results for the template Result on backtracking over Goal. | |
| serql.pl | ||
| serql_compile/3 | Compile a SeRQL query, returning the result in Compiled. | |
| serql_query/3 | Where Query is either a SeRQL query text or a parsed query. | |
| serql_run/2 | | |
| serql_runtime.pl | ||
| serql_compare/3 | Handle numerical and textual comparison of literals. | |
| serql_member_statement/2 | Get the individual triples from the original reply. | |
| serql_xml_result.pl | ||
| xml_read_result_table/3 | Read an XML document from In and return the rows and variable names in there. | |
| xml_to_result_table/3 | Convert a parsed XML document into a list of rows and a column name (variable name) term of the format names(Col1, Col2, ...). | |
| sparql.pl | ||
| sparql_compile/3 | Performs the compilation pass of solving a SPARQL query. | |
| sparql_query/3 | Where Query is either a SPARQL query text or a parsed query. | |
| sparql_run/2 | Runs a compiled SPARQL query, returning the result incrementally on backtracking. | |
| sparql_csv_result.pl -- Write SPARQL results as CSV | ||
| sparql_write_csv_result/3 | Emit results from a SPARQL SELECT query as CSV. | |
| sparql_grammar.pl -- SPARQL Parser | ||
| sparql_parse/3 | Parse the SPARQL statement Input into a Prolog representation. | |
| sparql_json_result.pl -- Write SPARQL results as JSON | ||
| sparql_write_json_result/3 | Emit results from a SPARQL query as JSON. | |
| sparql_runtime.pl -- SPARQL runtime support | ||
| sparql_eval/2 | Evaluate a SPARQL expression. | |
| sparql_eval_raw/2 | Same as sparql_eval/2, but return the raw result. | |
| sparql_find/5 | Implement *(PropertyPath). | |
| sparql_group/1 | Same as call. | |
| sparql_group/3 | Execute a group that contains non-steadfast variables, which asks for delayed unification of the output arguments. | |
| sparql_minus/2 | Realise SPARQL MINUS. | |
| sparql_reset_bnodes/0 | Reset the database for the BNODE(str) function. | |
| sparql_service/5 | Execute a remote SPARQL SERVICE request. | |
| sparql_simplify/2 | Simplify goals to the SPARQL runtime functions before they are handed to the general optimizer and runtime evaluation. | |
| sparql_subquery/3 | Execute a SPARQL subquery. | |
| sparql_true/1 | Generated from FILTER Term, where Term must be converted to a boolean as 'Effective Boolean Value'. | |
| sparql_update/1 | Handle SPARQL update requests. | |
| sparql_xml_result.pl | ||
| sparql_write_xml_result/3 | Write SPARQL XML result data. | |
| text_properties.pl | ||
| functional_property/2 | These functional properties deal with text matching. | |
SPARQL TODO List
- Complete SORT BY:
- Compare order in test-cases
- Value-specific comparison
- Compare expression results (e.g., ASC(?a+?b))
- Implement value based semantics in xsd:dateTime
- { ?x ?y 1 } cannot be mapped to
rdf(X, Y, literal(type(xsd:integer, '1')))because it must match :a :b "01"^^xsd:integer. - Does SPARQL define a total ordering of literals? If so, we may use this for the literal AVL-tree and speedup some of these queries a lot.