ancient bug solved. if the term is (eq TY A B) the signature of A and B was

[helm.git] / matita / help / C / sec_terms.xml

diff --git a/matita/help/C/sec_terms.xml b/matita/help/C/sec_terms.xml
index d2594c718ba2c35d753c3e4c9c6a1edb1ab04039..11b06b21cab7269c8bd3bd2867ed8bc48b31f1c5 100644 (file)
--- a/matita/help/C/sec_terms.xml
+++ b/matita/help/C/sec_terms.xml
@@ -26,78 +26,90 @@
   <title>Terms &amp; co.</title>
   <sect2 id="lexical">
   <title>Lexical conventions</title>
-  <para>
-    <table frame="all" rowsep="0" colsep="0">
+    <table frame="topbot" rowsep="0" colsep="0" role="grammar">
       <title>id</title>
       <tgroup cols="4">
       <tbody>
        <row>
-       <entry id="id">&id;</entry>
+       <entry id="grammar.id">&id;</entry>
        <entry>::=</entry>
-        <entry><emphasis>〈〈any sequence of letters, underscores or valid <ulink url="http://www.w3.org/TR/2004/REC-xml-20040204/#NT-Digit">XML digits</ulink> prefixed by a latin letter ([a-zA-Z]) and post-fixed by a possible empty sequence of decorators ([?'`])〉〉</emphasis></entry>
+        <entry><emphasis>〈〈any sequence of letters, underscores or valid <ulink type="http" url="http://www.w3.org/TR/2004/REC-xml-20040204/#NT-Digit">XML digits</ulink> prefixed by a latin letter ([a-zA-Z]) and post-fixed by a possible empty sequence of decorators ([?'`])〉〉</emphasis></entry>
        </row>
       </tbody>
      </tgroup>
     </table>
-    <table frame="all" rowsep="0" colsep="0">
+    <table frame="topbot" rowsep="0" colsep="0" role="grammar">
       <title>nat</title>
       <tgroup cols="4">
       <tbody>
        <row>
-       <entry id="nat">&nat;</entry>
+       <entry id="grammar.nat">&nat;</entry>
        <entry>::=</entry>
-       <entry><emphasis>〈〈any sequence of valid <ulink url="http://www.w3.org/TR/2004/REC-xml-20040204/#NT-Digit">XML digits</ulink></emphasis></entry>
+       <entry><emphasis>〈〈any sequence of valid <ulink type="http" url="http://www.w3.org/TR/2004/REC-xml-20040204/#NT-Digit">XML digits</ulink>〉〉</emphasis></entry>
        </row>
       </tbody>
      </tgroup>
     </table>
-    <table frame="all" rowsep="0" colsep="0">
+    <table frame="topbot" rowsep="0" colsep="0" role="grammar">
       <title>char</title>
       <tgroup cols="4">
       <tbody>
        <row>
-       <entry id="char">&char;</entry>
+       <entry id="grammar.char">&char;</entry>
        <entry>::=</entry>
        <entry>[<emphasis role="bold">a</emphasis>-<emphasis role="bold">zA</emphasis>-<emphasis role="bold">Z0</emphasis>-<emphasis role="bold">9_-</emphasis>]</entry>
        </row>
       </tbody>
      </tgroup>
     </table>
-    <table frame="all" rowsep="0" colsep="0">
+    <table frame="topbot" rowsep="0" colsep="0" role="grammar">
       <title>uri-step</title>
       <tgroup cols="4">
       <tbody>
        <row>
-       <entry id="uri-step">&uri-step;</entry>
+       <entry id="grammar.uri-step">&uri-step;</entry>
        <entry>::=</entry>
        <entry>&char;[&char;]…</entry>
        </row>
       </tbody>
      </tgroup>
     </table>
-    <table frame="all" rowsep="0" colsep="0">
+    <table frame="topbot" rowsep="0" colsep="0" role="grammar">
       <title>uri</title>
       <tgroup cols="4">
       <tbody>
        <row>
-       <entry id="uri">&uri;</entry>
+       <entry id="grammar.uri">&uri;</entry>
        <entry>::=</entry>
        <entry>[<emphasis role="bold">cic:/</emphasis>|<emphasis role="bold">theory:/</emphasis>]&uri-step;[<emphasis role="bold">/</emphasis>&uri-step;]…<emphasis role="bold">.</emphasis>&id;[<emphasis role="bold">.</emphasis>&id;]…[<emphasis role="bold">#xpointer(</emphasis>&nat;<emphasis role="bold">/</emphasis>&nat;[<emphasis role="bold">/</emphasis>&nat;]…<emphasis role="bold">)</emphasis>]</entry>
        </row>
       </tbody>
      </tgroup>
     </table>
-  </para>
   </sect2>
   <sect2 id="terms">
   <title>Terms</title>
+
+  <!-- ZACK: Sample EBNF snippet, see:
+  http://www.docbook.org/tdg/en/html/productionset.html -->
+  <!--
+  <productionset>
+    <title>Terms</title>
+    <production id="grammar.term">
+      <lhs>&term;</lhs>
+      <rhs>&sterm;</rhs>
+      <lineannotation></lineannotation>
+    </production>
+  </productionset>
+  -->
+
   <para>
-  <table frame="all" rowsep="0" colsep="0">
+  <table frame="topbot" rowsep="0" colsep="0" role="grammar">
     <title>Terms</title>
     <tgroup cols="4">
     <tbody>
      <row>
-      <entry id="term">&term;</entry>
+      <entry id="grammar.term">&term;</entry>
       <entry>::=</entry>
       <entry>&sterm;</entry>
       <entry>simple or delimited term</entry>
@@ -141,11 +153,10 @@
      <row>
       <entry/>
       <entry>|</entry>
-      <entry><emphasis role="bold">let</emphasis>
-      [<emphasis role="bold">co</emphasis>]<emphasis role="bold">rec</emphasis>
-      &id; [&id;|<emphasis role="bold">(</emphasis>&id;[<emphasis role="bold">,</emphasis>&term;]… <emphasis role="bold">:</emphasis>&term;<emphasis role="bold">)</emphasis>]… [<emphasis role="bold">on</emphasis> &nat;]
-      [<emphasis role="bold">:</emphasis> &term;]
-      <emphasis role="bold">≝</emphasis> &term;
+      <entry>
+       <emphasis role="bold">let</emphasis>
+       [<emphasis role="bold">co</emphasis>]<emphasis role="bold">rec</emphasis>
+       &rec_def;
       </entry>
       <entry>(co)recursive definitions</entry>
      </row>
@@ -153,10 +164,7 @@
       <entry/>
       <entry/>
       <entry>
-      [<emphasis role="bold">and</emphasis>
-      [&id;|<emphasis role="bold">(</emphasis>&id;[<emphasis role="bold">,</emphasis>&term;]… <emphasis role="bold">:</emphasis>&term;<emphasis role="bold">)</emphasis>]… [<emphasis role="bold">on</emphasis> &nat;]
-      [<emphasis role="bold">:</emphasis> &term;]
-      <emphasis role="bold">≝</emphasis> &term;]…
+      [<emphasis role="bold">and</emphasis> &rec_def;]…
       </entry>
       <entry/>
      </row>
@@ -174,16 +182,34 @@
       <entry>…</entry>
       <entry>user provided notation</entry>
      </row>
+      <row>
+       <entry id="grammar.rec_def">&rec_def;</entry>
+       <entry>::=</entry>
+       <entry>
+         &id; [&id;|<emphasis role="bold">(</emphasis>&id;[<emphasis role="bold">,</emphasis>&term;]… <emphasis role="bold">:</emphasis>&term;<emphasis role="bold">)</emphasis>]…
+       </entry>
+       <entry />
+      </row>
+      <row>
+       <entry />
+       <entry />
+       <entry>
+         [<emphasis role="bold">on</emphasis> &nat;]
+         [<emphasis role="bold">:</emphasis> &term;]
+         <emphasis role="bold">≝</emphasis> &term;]
+       </entry>
+       <entry />
+      </row>
     </tbody>
    </tgroup>
   </table>
 
-  <table frame="all" rowsep="0" colsep="0">
+  <table frame="topbot" rowsep="0" colsep="0" role="grammar">
     <title>Simple terms</title>
     <tgroup cols="4">
     <tbody>
      <row>
-      <entry id="sterm">&sterm;</entry>
+      <entry id="grammar.sterm">&sterm;</entry>
       <entry>::=</entry>
       <entry><emphasis role="bold">(</emphasis>&term;<emphasis role="bold">)</emphasis></entry>
       <entry/>
@@ -252,11 +278,9 @@
       <entry/>
       <entry>
        <emphasis role="bold">[</emphasis> 
-       &match_pattern; <emphasis role="bold"> ⇒ </emphasis> &term;
-         [
-         <emphasis role="bold">|</emphasis>
-         &match_pattern; <emphasis role="bold"> ⇒ </emphasis> &term;
-         ]…<emphasis role="bold">]</emphasis> </entry>
+       &match_branch;[<emphasis role="bold">|</emphasis>&match_branch;]…
+       <emphasis role="bold">]</emphasis> 
+      </entry>
       <entry/>
      </row>
      <row>
@@ -275,12 +299,12 @@
    </tgroup>
   </table>
 
-  <table frame="all" rowsep="0" colsep="0">
+  <table frame="topbot" rowsep="0" colsep="0" role="grammar">
     <title>Arguments</title>
     <tgroup cols="4">
     <tbody>
      <row>
-      <entry id="args">&args;</entry>
+      <entry id="grammar.args">&args;</entry>
       <entry>::=</entry>
       <entry>
        <emphasis role="bold">_</emphasis>[<emphasis role="bold">:</emphasis> &term;]
@@ -307,16 +331,8 @@
       <entry><emphasis role="bold">(</emphasis>&id;[<emphasis role="bold">,</emphasis>&id;]…[<emphasis role="bold">:</emphasis> &term;]<emphasis role="bold">)</emphasis></entry>
       <entry/>
      </row>
-    </tbody>
-   </tgroup>
-  </table>
-
-  <table frame="all" rowsep="0" colsep="0">
-    <title>Miscellaneous arguments</title>
-    <tgroup cols="4">
-    <tbody>
      <row>
-      <entry id="args2">&args2;</entry>
+      <entry id="grammar.args2">&args2;</entry>
       <entry>::=</entry>
       <entry>&id;</entry>
       <entry/>
@@ -331,12 +347,18 @@
    </tgroup>
   </table>
 
-  <table frame="all" rowsep="0" colsep="0">
+  <table frame="topbot" rowsep="0" colsep="0" role="grammar">
     <title>Pattern matching</title>
     <tgroup cols="4">
     <tbody>
+      <row>
+       <entry id="grammar.match_branch">&match_branch;</entry>
+       <entry>::=</entry>
+       <entry>&match_pattern; <emphasis role="bold">⇒</emphasis> &term;</entry>
+       <entry />
+      </row>
      <row>
-      <entry id="match_pattern">&match_pattern;</entry>
+      <entry id="grammar.match_pattern">&match_pattern;</entry>
       <entry>::=</entry>
       <entry>&id;</entry>
       <entry>0-ary constructor</entry>
@@ -485,12 +507,12 @@
 
     <sect2 id="introsspec">
     <title>intros-spec</title>
-    <table frame="all" rowsep="0" colsep="0">
+    <table frame="topbot" rowsep="0" colsep="0" role="grammar">
       <title>intros-spec</title>
       <tgroup cols="4">
       <tbody>
        <row>
-       <entry id="intros-spec">&intros-spec;</entry>
+       <entry id="grammar.intros-spec">&intros-spec;</entry>
        <entry>::=</entry>
         <entry>[&nat;] [<emphasis role="bold">(</emphasis>[&id;]…<emphasis role="bold">)</emphasis>]</entry>
        </row>
@@ -502,12 +524,12 @@
 
     <sect2 id="pattern">
     <title>pattern</title>
-    <table frame="all" rowsep="0" colsep="0">
+    <table frame="topbot" rowsep="0" colsep="0" role="grammar">
       <title>pattern</title>
       <tgroup cols="4">
       <tbody>
        <row>
-       <entry id="pattern">&pattern;</entry>
+       <entry id="grammar.pattern">&pattern;</entry>
        <entry>::=</entry>
         <entry>&TODO;</entry>
        </row>
@@ -522,12 +544,12 @@
     <para>Reduction kinds are normalization functions that transform a term
      to a convertible but simpler one. Each reduction kind can be used both
      as a tactic argument and as a stand-alone tactic.</para>
-    <table frame="all" rowsep="0" colsep="0">
+    <table frame="topbot" rowsep="0" colsep="0" role="grammar">
       <title>reduction-kind</title>
       <tgroup cols="4">
       <tbody>
        <row>
-       <entry id="reduction-kind">&reduction-kind;</entry>
+       <entry id="grammar.reduction-kind">&reduction-kind;</entry>
        <entry>::=</entry>
         <entry><emphasis role="bold">demodulate</emphasis></entry>
        </row>
@@ -553,8 +575,8 @@
         <entry/>
         <entry>|</entry>
         <entry><emphasis role="bold">unfold</emphasis> [&sterm;]</entry>
-        <entry>δ-reduces the constant or variable specified, or that
-         in head position if none is specified</entry>
+        <entry>δ-reduces the constant or variable if specified, or that
+         in head position</entry>
        </row>
        <row>
         <entry/>