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Implementation
The MathQL-1 Suite for HELM is implemented in Caml and is currently available through
the HELM CVS repository.
The Suite provides the following software components:
- The basic Caml package for MathQL-1 (mathql)
provides a HELM independent Caml
representation of queries and query results, plus some functions to convert
this representation in text and XML and viceversa.
- The MathQL-1 interpreter (mathql_interpreter)
is HELM dependent just in the implementation of the property operator,
which still relies on the architecture of the relational database holding
HELM metadata. The HELM team is planning to remove this drawback in the
near future.
- The HELM query generator (mathql_generator)
allows to build specific kinds of MathQL-1 queries, which are meaningful
in the context of HELM, starting from a high-level description of the wanted
results. These queries are descibed at an abstract level in the following
paper:
- F. Guidi and C. Sacerdoti Coen: Querying Distributed
Digital Libraries of Mathematics.
- The testing software for the MathQL-1 Suite (mathql_test)
providides three textual interfaces (one for the basic package, one for
the interpreter and one for the query generator) with specific features meant
for testing.
The current version of the Suite, realized entirely by F. Guidi, implements
MathQL-1 version 3 (i.e. MathQL-1.3). The newly implemented features, which
are not included in the ufficial documentation
yet, are reported in the What's new section.
The latest HELM
query engine (enter here
if you are behind a restrictive firewall), powered by MathQL-1.3, allows to
issue both user-defined queries and the specific queries produced by the
HELM query generator.
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