<html>
<head>
<title>MathQL</title>
-
+
<meta http-equiv="content-type"
content="text/html; charset=ISO-8859-1">
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+
<meta name="author" content="Ferruccio Guidi">
-
+
<meta name="description" content="MathQL Home Page">
</head>
<body>
-
+
<h1 align="center">MathQL-1</h1>
-
-<h2 align="center">A query language for RDF metadata</h2>
+<h2 align="center">A query language for RDF metadata</h2>
+
<table cellpadding="10" cellspacing="2" border="0" width="95%"
bgcolor="#ffffff">
- <tbody>
- <tr>
- <td valign="top" align="left">
-
+ <tbody>
+ <tr>
+ <td valign="top" align="left">
+
<ul>
- <li><a href="index.html">Forward</a><br>
- </li>
-
+
<li><a href="index.html">Forward</a><br>
+ </li>
+
</ul>
-
+
<ul>
- <li><a href="features.html">Features</a></li>
-
+
<li><a href="features.html">Features</a></li>
+
</ul>
-
- <ul>
- <li>Documentation</li>
+ <ul>
+ <li>Documentation</li>
+
</ul>
-
+
<ul>
- <li><a href="implementation.html">Implementation</a><br>
- </li>
-
+
<li><a href="implementation.html">Implementation</a><br>
+ </li>
+
</ul>
-
+
<ul>
- <li><a href="authors.html">The authors</a><br>
- </li>
-
+
<li><a href="authors.html">The authors</a><br>
+ </li>
+
</ul>
-
+
<ul>
- <li><a href="links.html">Links</a><br>
- </li>
-
+
<li><a href="links.html">Links</a><br>
+ </li>
+
</ul>
- <br>
- </td>
- <td valign="top">
+ <br>
+ </td>
+ <td valign="top">
<div align="right"><b>Documentation</b><br>
- </div>
- <br>
- <br>
- </td>
- </tr>
-
- </tbody>
+ </div>
+ <br>
+ All available information about MathQL-1 can be found in the papers below
+(listed in order of relevance):<br>
+ <br>
+ <br>
+ <b>Papers concerning the latest version of MathQL-1:</b><br>
+
+ <ul>
+ <li>F. Guidi: <i>Searching and Retrieving in Content-based Repositories
+of Formal Mathematical Knowledge</i> Ph.D. Thesis in Computer Science, University
+of Bologna, 2003.</li>
+
+ </ul>
+ <ul>
+ <li>F. Guidi and I. Schena: <a
+ href="http://monet.nag.co.uk/mkm/bertinoro03/guidi.pdf"><i>A Query Language
+for a Metadata Framework about Mathematical Resources</i></a>. Presentation
+at the 2nd International Conference on Mathematical Knowledge Management
+(MKM 2003). Bertinoro, Italy, February 2003.<br>
+ </li>
+ </ul>
+ <b>Papers concerning the erlier versions of MathQL-1:</b><br>
+
+ <ul>
+ <li>F. Guidi and I. Schena: <a
+ href="http://link.springer.de/link/service/series/0558/papers/2594/25940105.pdf"><i>A
+Query Language for a Metadata Framework about Mathematical Resources</i></a>.
+In Proc. of the 2nd International Conference on Mathematical Knowledge Management
+(MKM 2003). Bertinoro, Italy, February 2003. LNCS 2594, pages 105-118, Springer.
+2003.</li>
+
+ </ul>
+
+ <ul>
+ <li>L. Natile: <i>Tecnologie per l'Interrogazione di Basi Documentarie
+in Formato XML</i>. Master Thesis in Computer Science, University of Bologna,
+2002.</li>
+
+ </ul>
+
+ <ul>
+ <li>A. Nediani: <i>Disegno e Implementazione di un'Interfaccia Web
+di Supporto ad Interrogazioni su Basi di Dati Documentarie</i>. Master Thesis
+in Computer Science, University of Bologna, 2003.</li>
+
+ </ul>
+
+ <ul>
+ <li>D. Lordi: <i>Sperimentazione e Sviluppo di Strumenti per la
+gestione di metadati</i>. Master Thesis in Computer Science, University of
+Bologna, 2002.<br>
+ </li>
+
+ </ul>
+ </td>
+ </tr>
+
+ </tbody>
</table>
- <small></small> <br>
- <br>
- <br>
- <br>
- <br>
+ <br>
</body>
</html>
<html>
<head>
<title>MathQL</title>
-
+
<meta http-equiv="content-type"
content="text/html; charset=ISO-8859-1">
-
+
<meta name="author" content="Ferruccio Guidi">
-
+
<meta name="description" content="MathQL Home Page">
</head>
<body>
-
+
<h1 align="center">MathQL-1</h1>
-
+
<h2 align="center">A query language for RDF metadata</h2>
-
+
<table cellpadding="10" cellspacing="2" border="0" width="95%"
bgcolor="#ffffff">
- <tbody>
- <tr>
- <td valign="top" align="left">
-
+ <tbody>
+ <tr>
+ <td valign="top" align="left">
+
<ul>
- <li><a href="index.html">Forward</a><br>
- </li>
-
+ <li><a href="index.html">Forward</a><br>
+ </li>
+
+ </ul>
+
+ <ul>
+ <li>Features</li>
+
+ </ul>
+
+ <ul>
+ <li><a href="documentation.html">Documentation</a></li>
+
</ul>
<ul>
- <li>Features</li>
+ <li><a href="implementation.html">Implementation</a><br>
+ </li>
</ul>
<ul>
- <li><a href="documentation.html">Documentation</a></li>
-
+ <li><a href="authors.html">The authors</a><br>
+ </li>
+
</ul>
-
+
<ul>
- <li><a href="implementation.html">Implementation</a><br>
- </li>
-
+ <li><a href="links.html">Links</a><br>
+ </li>
+
</ul>
-
- <ul>
- <li><a href="authors.html">The authors</a><br>
+ <br>
+ </td>
+ <td valign="top">
+ <div align="right"><b>Goals and features</b><br>
+ </div>
+ <br>
+ MathQL-1 is designed to achieve the following goals:<br>
+ <ol>
+ <li>Exploitation of <a href="http://www.w3.org/RDF/">RDF</a> technology
+to manage metadata and <b>compliance with the main requirements</b> for an
+RDF query language. In particular:</li>
+ </ol>
+ <blockquote>
+ <ul>
+ <li>MathQL-1 provides facilities for hierarchical constraints based
+on <a href="http://www.w3.org/TR/rdf-schema/">RDF Schema</a> and for traversal
+of compound values of properties.</li>
+ </ul>
+ <ul>
+ <li>MathQL-1 provides a full set of Boolean operators to compose
+query constraints and facilities for selecting URI's or literals by means
+of regular expressions.</li>
+ </ul>
+ <ul>
+ <li>MathQL-1 allows to customize the query results specifying what
+part of a solution should be preserved or discarded.</li>
+ </ul>
+ <ul>
+ <li>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.</li>
+ </ul>
+ <ul>
+ <li>MathQL-1 supports a machine-processable <a
+ href="http://www.w3.org/XML/">XML</a> syntax as well as a human-readable
+textual syntax to achieve the best usability.<br>
</li>
-
- </ul>
-
- <ul>
- <li><a href="links.html">Links</a><br>
+ </ul>
+ </blockquote>
+ <ol start="2">
+ <li>Careful <b>treatment of query results</b> that are as important
+as the queries themselves. In particular:<br>
+ </li>
+ </ol>
+ <blockquote>
+ <ul>
+ <li>MathQL-1 query results have a 4-dimensional geometry whereas
+other languages assume that query results are returned in 1-dimensional structures
+(ie lists of resources) or 2-dimensional structures (ie relational database
+tables). This allows to get better outcomes from queries returning structured
+results.<br>
</li>
-
- </ul>
- <br>
- </td>
- <td valign="top">
- <div align="right"><b>Features</b><br>
- </div>
- <br>
- <br>
- </td>
- </tr>
-
- </tbody>
+ </ul>
+ <ul>
+ <li>Besides the syntax for queries, MathQL-1 provides a syntax
+for query results with its own rigorously defined semantics.<br>
+ </li>
+ </ul>
+ </blockquote>
+ <ol start="3">
+ <li>Exploitation of <b>constructions borrowed from programming languages</b>
+to allow sophisticated queries that need computation over the queried data.
+In particular:<br>
+ </li>
+ </ol>
+ <blockquote>
+ <ul>
+ <li>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.</li>
+ </ul>
+ </blockquote>
+ </td>
+ </tr>
+ </tbody>
</table>
- <small></small> <br>
- <br>
- <br>
- <br>
- <br>
+<br>
</body>
</html>
<html>
<head>
<title>MathQL</title>
-
+
+
<meta http-equiv="content-type"
content="text/html; charset=ISO-8859-1">
-
+
<meta name="author" content="Ferruccio Guidi">
-
+
<meta name="description" content="MathQL Home Page">
</head>
<body>
-
+
<h1 align="center">MathQL-1</h1>
-
+
<h2 align="center">A query language for RDF metadata</h2>
-
+
<table cellpadding="10" cellspacing="2" border="0" width="95%"
bgcolor="#ffffff">
- <tbody>
- <tr>
- <td valign="top" align="left">
-
+ <tbody>
+ <tr>
+ <td valign="top" align="left">
+
<ul>
- <li>Forward<br>
- </li>
-
-
+ <li>Forward<br>
+ </li>
+
+
</ul>
-
+
<ul>
- <li><a href="features.html">Features</a></li>
-
+
<li><a href="features.html">Features</a></li>
+
</ul>
-
+
<ul>
- <li><a href="documentation.html">Documentation</a></li>
-
-
+
<li><a href="documentation.html">Documentation</a></li>
+
+
</ul>
-
+
<ul>
- <li><a href="implementation.html">Implementation</a><br>
- </li>
-
+
<li><a href="implementation.html">Implementation</a><br>
+ </li>
+
</ul>
-
+
<ul>
- <li><a href="authors.html">The authors</a><br>
- </li>
-
-
+
<li><a href="authors.html">The authors</a><br>
+ </li>
+
+
</ul>
-
+
<ul>
- <li><a href="links.html">Links</a><br>
- </li>
-
+
<li><a href="links.html">Links</a><br>
+ </li>
+
</ul>
- <br>
- </td>
- <td valign="top">
-
+ <br>
+ </td>
+ <td valign="top">
+
<div align="right"><b>Forward</b><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
+ </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>
+ href="http://www.w3.org/">W3C</a> standartd for describing Web resources
+ at the general-purpose content level.<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>
+ 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>
- <br>
- <br>
-
-<div align="center">This site is maintained by Ferruccio Guidi, last update:
- March 13, 2003.<br>
-<br>
-</div>
+ <br>
+ <br>
+
+<div align="center">This site is maintained by <a
+ href="mailto://fguidi@cs.unibo.it">Ferruccio Guidi</a>, last update: March
+14, 2003.<br>
+ <br>
+ </div>
+ <br>
</body>
</html>
projects / helm.git / commitdiff