--- /dev/null
+<?xml version="1.0" encoding="UTF-8"?>
+
+<page xmlns="http://lambdadelta.info/"
+ description = "\lambda\delta home page"
+ title = "\lambda\delta home page"
+ head = "The Formal System λδ (\lambda\delta)"
+>
+ <sitemap name="sitemap"/>
+
+ <section5 name="milestones">Milestones</section5>
+ <body>
+ <news date="June 2014.">
+ <rlink to="documentation.html#ldt8">First communication on λδ version 2.</rlink>
+ </news>
+ <news date="December 2012.">
+ The character "_" is removed from the denomination "lambda_delta":
+ <list>
+ <item>
+ The denomination "\lambda\delta" is used in λδ-related texts.
+ </item>
+ <item>
+ The denomination "lambdadelta" is used in λδ-related identifiers.
+ </item>
+ <item>
+ Permanent λδ URL acquired:
+ <rlink to="">http://lambdadelta.info/</rlink>
+ (pointing at this site).
+ </item>
+ </list>
+ </news>
+ <news date="September 2011.">
+ The denomination "lambda-delta" changes to "lambda_delta":
+ <list>
+ <item>
+ The character "-" is reserved in λδ textual syntax
+ (recognized by "Helena 0.8.1").
+ </item>
+ <item>
+ Eventually, the occurrences of the character "-"
+ will be replaced by "_" in all λδ-related identifiers.
+ </item>
+ <item>
+ In particular, this refactoring involves file names and path names.
+ </item>
+ </list>
+ </news>
+ <news date="April 2011.">
+ The specification of <rlink to="version_2.html">λδ version 2</rlink>
+ and related topics is restarted in
+ <link to="http://matita.cs.unibo.it/">Matita 0.5</link>.
+ </news>
+ <news date="December 2010.">
+ Transient λδ URL acquired: http://lambda-delta.info/ (expires on December 2012).
+ </news>
+ <news date="November 2010.">
+ "Helena 0.8.1" is released.
+ </news>
+ <news date="September 2009.">
+ "Helena 0.8.0" is released and the
+ <rlink to="implementation.html#lddl">λδ Digital Library</rlink>
+ is started.
+ </news>
+ <news date="June 2009.">
+ "Helena", a <rlink to="implementation.html#helena">validator for λδ version 2</rlink>,
+ is available as a part of the <link to="http://helm.cs.unibo.it/">HELM</link> software.
+ </news>
+ <news date="September 2008.">
+ This site is online.
+ </news>
+ <news date="July 2008.">
+ <rlink to="documentation.html#ldp5">First journal paper on λδ</rlink>
+ accepted for publication.
+ </news>
+ <news date="July 2008.">
+ First <link to="http://helm.cs.unibo.it/procedural/">procedural reconstruction</link>
+ for <link to="http://matita.cs.unibo.it/">Matita 0.5</link>
+ of the λδ version 1 for Coq 7.3.1.
+ </news>
+ <news date="June 2008.">
+ The <rlink to="version_1.html#static">
+ HTML pages of the specification of λδ version 1 for Matita 0.5</rlink>
+ are online.
+ </news>
+ <news date="May 2008.">
+ The specification of λδ version 1 is dismissed.
+ </news>
+ <news date="March 2008.">
+ The specification of λδ version 2 is started with Coq 7.3.1 (false start).
+ </news>
+ <news date="September 2007.">
+ The <rlink to="version_1.html#dynamic">
+ specification of λδ version 1 for Matita 0.4</rlink>
+ is online.
+ </news>
+ <news date="November 2006.">
+ <rlink to="documentation.html#ldp3">λδ version 1</rlink>
+ is released.
+ </news>
+ <news date="December 2005.">
+ <rlink to="documentation.html#ldt1">First communication on λδ</rlink>.
+ </news>
+ <news date="May 2004.">
+ The specification of <rlink to="version_1.html">λδ version 1</rlink>
+ is started with Coq 7.3.1.
+ </news>
+ </body>
+
+ <section4 name="visibility">Visibility</section4>
+ <body>
+ <news date="June 2014.">
+ The <link to="http://www.google.com/">Google</link>
+ search for "formal system lambda delta" gives
+ 5 resources about λδ in the first 6 results.
+ </news>
+ <news date="June 2014.">
+ The <link to="http://www.yahoo.com/">Yahoo</link>
+ search for "formal system lambda delta" gives
+ 4 resources about λδ in the first 5 results.
+ </news>
+ </body>
+
+ <footer/>
+</page>
projects / helm.git / blobdiff