+<?xml version="1.0" encoding="UTF-8"?>
+
+<page xmlns="http://lambdadelta.info/"
+ description = "lambdadelta version 2"
+ title = "lambdadelta version 2"
+ head = "cic:/matita/lambdadelta/ground_2/ (background for λδ version 2)"
+>
+ <section>Summary of the Specification</section>
+ <body>Here is a numerical acount of the specification's contents
+ and its timeline.
+ Nodes are counted according to the "intrinsinc complexity measure"
+ [F. Guidi: "Procedural Representation of CIC Proof Terms"
+ Journal of Automated Reasoning 44(1-2), Springer (February 2010),
+ pp. 53-78].
+ </body>
+ <table name="ground_2_sum"/>
+ <news date="2013 November 27.">
+ Natural numbers with infinity.
+ </news>
+ <news date="2011 August 10.">
+ Specification starts.
+ </news>
+
+ <section>Logical Structure of the Specification</section>
+ <body>The source files are grouped in planes
+ according to the following table.
+ Notation files covering the whole specification are provided.
+ The notation for the relations or functions introduced in each file
+ is shown in parentheses (? are placeholders).
+ </body>
+ <table name="ground_2_src"/>
+
+ <section>Physical Structure of the Specification</section>
+ <body>The source files are grouped in directories,
+ one for each plane.
+ </body>
+ <footer/>
+</page>