Module kb_query 

Knowledge Base Query Language

This module provides a SPARQL-like query language for semantic knowledge bases:

• Triple pattern matching for graph queries
• Pattern matching for logic terms with wildcards
• Query optimization (join order, filter pushdown)
• Complex boolean queries (AND/OR/NOT)

Structs

Query

A query for the knowledge base

QueryExecutor

Query executor with optimization

QueryResult

Query execution result

QueryStats

Query execution statistics

Enums

BooleanQuery

Boolean query operators

FilterExpr

Query filter expressions

QueryPattern

Query pattern for matching predicates

TermPattern

Pattern for matching terms

TermType

Term type for type constraints