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+
- - Features
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+ - Features
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Goals and features
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- MathQL-1 is designed to achieve the following goals:
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+ MathQL-1 is designed to achieve the following goals:
+
- - Exploitation of RDF technology
- to manage metadata and compliance with the main requirements for
-an RDF query language. In particular:
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+ - Exploitation of RDF technology
+ to manage metadata and compliance with the main requirements for an
+ RDF query language. In particular:
+
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- - MathQL-1 provides facilities for hierarchical constraints
-based on RDF Schema and for
-traversal of compound values of properties.
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+ - MathQL-1 provides facilities for hierarchical constraints
+ based on RDF Schema and for
+ traversal of compound values of properties.
+
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+
- - MathQL-1 provides a full set of Boolean operators to compose
- the query constraints and facilities for selecting URI's or literals by
-means of regular expressions.
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+ - MathQL-1 provides a full set of Boolean operators to compose
+ the query constraints and facilities for selecting URI's or literals by means
+ of regular expressions.
+
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+
- - MathQL-1 allows to customize the query results specifying
-what part of a solution should be preserved or discarded.
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+ - MathQL-1 allows to customize the query results specifying
+ what part of a solution should be preserved or discarded.
+
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- - MathQL-1 has a well-conceived semantics defined in term of
- an abstract metadata model, imposes that queries return exhaustive solutions
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- MathQL-1 has a well-conceived semantics defined in term
+of an abstract metadata model, imposes that queries return exhaustive solutions
and includes a "select-from-where"-like construction.
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+
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+
- - MathQL-1 supports a machine-processable XML syntax as well as a human-readable
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- MathQL-1 supports a machine-processable XML syntax as well as a human-readable
textual syntax to achieve the best usability.
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- - Careful treatment of query results that are as important
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- Careful treatment of query results that are as important
as the queries themselves. In particular:
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- - MathQL-1 query results have a 4-dimensional geometry whereas
- other languages assume that query results are returned in 1-dimensional
-structures (i.e. lists of resources) or 2-dimensional structures (i.e. relational
-database tables). This allows to get better outcomes from queries returning
-structured results.
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+ - MathQL-1 query results have a 4-dimensional geometry whereas
+ other languages assume that query results are returned in 1-dimensional structures
+ (i.e. lists of resources) or 2-dimensional structures (i.e. relational database
+ tables). This allows to get better outcomes from queries returning structured
+ results.
+
+
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+
- - Besides the syntax for queries, MathQL-1 provides a syntax
+
- Besides the syntax for queries, MathQL-1 provides a syntax
for query results with its own rigorously defined semantics.
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- - Exploitation of constructions borrowed from programming
-languages to allow sophisticated queries that need computation over
-the queried data. In particular:
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+ - Exploitation of constructions borrowed from programming
+languages to allow sophisticated queries that need computation over the
+queried data. In particular:
+
+
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+
- - MathQL-1 supports variables for storing intermediate query
- results, provides iterators over these results, has a conditional operator
+
- MathQL-1 supports variables for storing intermediate query
+ results, provides iterators over these results, has a conditional operator
and includes logging facilities for debugging purposes.
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