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<!-- ##### SECTION Title ##### -->
Graph patterns
<!-- ##### SECTION Short_Description ##### -->
Collections of triple patterns, sub-graph patterns with operators.
<!-- ##### SECTION Long_Description ##### -->
<para>
Graph patterns form a a tree structure that build a #rasqal_query
top-level graph pattern (see rasqal_query_get_query_graph_pattern())
which may have sub-graph patterns. Graph patterns at the leaf of the
tree operate over triple patterns (#rasqal_triple) matching the
RDF triples in the data sources for %RASQAL_GRAPH_PATTERN_OPERATOR_BASIC
or %RASQAL_GRAPH_PATTERN_OPERATOR_OPTIONAL. Other graph patterns
operators operate over sub graph patterns and group them, union them
or apply a GRAPH matching keyword (%RASQAL_GRAPH_PATTERN_OPERATOR_GRAPH).
</para>
<!-- ##### SECTION See_Also ##### -->
<para>
</para>
<!-- ##### SECTION Stability_Level ##### -->
<!-- ##### SECTION Image ##### -->
<!-- ##### TYPEDEF rasqal_graph_pattern ##### -->
<para>
</para>
<!-- ##### FUNCTION rasqal_graph_pattern_add_sub_graph_pattern ##### -->
<para>
</para>
@graph_pattern:
@sub_graph_pattern:
@Returns:
<!-- ##### FUNCTION rasqal_graph_pattern_get_filter_expression ##### -->
<para>
</para>
@gp:
@Returns:
<!-- ##### FUNCTION rasqal_graph_pattern_set_filter_expression ##### -->
<para>
</para>
@gp:
@expr:
@Returns:
<!-- ##### FUNCTION rasqal_graph_pattern_get_flattened_triples ##### -->
<para>
</para>
@query:
@graph_pattern:
@Returns:
<!-- ##### FUNCTION rasqal_graph_pattern_get_index ##### -->
<para>
</para>
@gp:
@Returns:
<!-- ##### FUNCTION rasqal_graph_pattern_get_operator ##### -->
<para>
</para>
@graph_pattern:
@Returns:
<!-- ##### FUNCTION rasqal_graph_pattern_get_origin ##### -->
<para>
</para>
@graph_pattern:
@Returns:
<!-- ##### FUNCTION rasqal_graph_pattern_get_sub_graph_pattern ##### -->
<para>
</para>
@graph_pattern:
@idx:
@Returns:
<!-- ##### FUNCTION rasqal_graph_pattern_get_sub_graph_pattern_sequence ##### -->
<para>
</para>
@graph_pattern:
@Returns:
<!-- ##### FUNCTION rasqal_graph_pattern_get_triple ##### -->
<para>
</para>
@graph_pattern:
@idx:
@Returns:
<!-- ##### FUNCTION rasqal_graph_pattern_get_triples ##### -->
<para>
</para>
@query:
@graph_pattern:
@Returns:
<!-- ##### FUNCTION rasqal_graph_pattern_get_service ##### -->
<para>
</para>
@graph_pattern:
@Returns:
<!-- ##### FUNCTION rasqal_graph_pattern_get_variable ##### -->
<para>
</para>
@graph_pattern:
@Returns:
<!-- ##### ENUM rasqal_graph_pattern_operator ##### -->
<para>
</para>
@RASQAL_GRAPH_PATTERN_OPERATOR_UNKNOWN:
@RASQAL_GRAPH_PATTERN_OPERATOR_BASIC:
@RASQAL_GRAPH_PATTERN_OPERATOR_OPTIONAL:
@RASQAL_GRAPH_PATTERN_OPERATOR_UNION:
@RASQAL_GRAPH_PATTERN_OPERATOR_GROUP:
@RASQAL_GRAPH_PATTERN_OPERATOR_GRAPH:
@RASQAL_GRAPH_PATTERN_OPERATOR_FILTER:
@RASQAL_GRAPH_PATTERN_OPERATOR_LET:
@RASQAL_GRAPH_PATTERN_OPERATOR_SELECT:
@RASQAL_GRAPH_PATTERN_OPERATOR_SERVICE:
@RASQAL_GRAPH_PATTERN_OPERATOR_MINUS:
@RASQAL_GRAPH_PATTERN_OPERATOR_VALUES:
@RASQAL_GRAPH_PATTERN_OPERATOR_LAST:
<!-- ##### FUNCTION rasqal_graph_pattern_operator_as_string ##### -->
<para>
</para>
@op:
@Returns:
<!-- ##### FUNCTION rasqal_graph_pattern_print ##### -->
<para>
</para>
@gp:
@fh:
@Returns:
<!-- ##### FUNCTION rasqal_graph_pattern_variable_bound_in ##### -->
<para>
</para>
@gp:
@v:
@Returns:
<!-- ##### USER_FUNCTION rasqal_graph_pattern_visit_fn ##### -->
<para>
</para>
@query:
@gp:
@user_data:
@Returns:
<!-- ##### FUNCTION rasqal_graph_pattern_visit ##### -->
<para>
</para>
@query:
@gp:
@fn:
@user_data:
@Returns:
|
