- </div>
- <br>
- The MathQL proposal rises in the context of the <a
- href="http://helm.cs.unibo.it/">HELM project</a>, which aims at the development
-of a suitable technology for the creation and maintenance of a virtual,
-distributed, hypertextual library of structured mathematical knowledge
-based on <a href="http://www.w3.org/XML/">XML</a> technology, through the
- integration of the current proof assistants and logical frameworks with
-the most recent technologies for the development of Web applications and
-electronic publishing.<br>
- <br>
- The objective of the MathQL proposal is the development of a set
-of query languages enabling the retrieval of formalized mathematical Web
- resources on the basis of content-aware requests. The first of these
-languages, <b>MathQL-1</b>, is focused on querying an arbitrary
- <a href="http://www.w3.org/RDF/">RDF</a> database because RDF is the
- <a href="http://www.w3.org/">W3C</a> standartd for describing Web
-resources at the general-purpose content level.<br>
- <br>
- As an RDF query language, MathQL-1 provides the main features required
- by the RDF community while complying with the needs of HELM. The peculiar
- aspects of this language concern the query results, which are highly
-structured and possess their own syntax, formally explained by a rigorous
-semantics.<br>
+ </div>
+ <br>
+ The MathQL proposal rises in the context of the <a
+ href="http://helm.cs.unibo.it/">HELM project</a>, which aims at the
+development of a suitable technology for the creation and maintenance
+of a virtual, distributed, hypertextual library of structured mathematical
+ knowledge based on <a href="http://www.w3.org/XML/">XML</a> technology,
+through the integration of the current proof assistants and logical frameworks
+with the most recent technologies for the development of Web applications
+and electronic publishing.<br>
+ <br>
+ The objective of the MathQL proposal is the development of a
+set of query languages enabling the retrieval of formalized mathematical
+Web resources on the basis of content-aware requests. The first of these
+ languages, <b>MathQL-1</b>, is focused on querying an arbitrary
+ <a href="http://www.w3.org/RDF/">RDF</a> database because RDF is the
+ <a href="http://www.w3.org/">W3C</a> standartd for describing Web
+ resources at the general-purpose content level.<br>
+ <br>
+ As an RDF query language, MathQL-1 provides the main features
+required by the RDF community while complying with the needs of HELM.
+The peculiar aspects of this language concern the query results, which
+are highly structured and possess their own syntax, formally explained
+by a rigorous semantics.<br>
+ <br>
+ MathQL-1 is particularly helpful in distributed systems where
+ query engines are implemented as stand-alone units, because in this
+situation the query results are exchanged between the system components
+as well as the queries, and thus both the queries and the query results
+need to be encoded in a clearly defined format.<br>
+ <br>
+ Other languages to be developed in the context of the MathQL proposal
+ will be suitable for queries about the semantic structure of mathematical
+ data: this will include content-based pattern-matching (MathQL-2) and possibly
+ other forms of formal matching involving for instance isomorphism, unification
+ and definitions expansion (MathQL-3).<br>
+ </td>
+ </tr>
+
+ </tbody>
+</table>