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<TITLE>A Guide to the TDF Specification, Issue 4.0</TITLE>
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<BODY TEXT="#000000" BGCOLOR="#FFFFFF" LINK="#0000FF" VLINK="#400080" ALINK="#FF0000">
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<H1>A Guide to the TDF Specification, Issue 4.0</H1>
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<H3>January 1998</H3>
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<A HREF="guide4.html"><IMG SRC="../images/next.gif" ALT="next section"></A>
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<IMG SRC="../images/no_top.gif" ALT="current document">
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<A HREF="../index.html"><IMG SRC="../images/home.gif" ALT="TenDRA home page">
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</A>
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<IMG SRC="../images/no_index.gif" ALT="document index"><P>
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<HR>
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<DL>
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<DT><A HREF="#intro"><B>1 </B> - Introduction</A><DD>
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<DT><A HREF="guide4.html#S3"><B>2 </B> - SORTs and TOKENs</A><DD>
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<DT><A HREF="guide5.html#S8"><B>3 </B> - CAPSULEs and UNITs</A><DD>
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<DT><A HREF="guide6.html#S18"><B>4 </B> - SHAPEs, ALIGNMENTs and OFFSETs.</A>
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<DD>
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<DT><A HREF="guide7.html#S37"><B>5 </B> - Procedures and Locals</A><DD>
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<DT><A HREF="guide8.html#S51"><B>6 </B> - Control Flow within procedures</A><DD>
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<DT><A HREF="guide9.html#S61"><B>7 </B> - Values, variables and assignments.</A>
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<DD>
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<DT><A HREF="guide10.html#S66"><B>8 </B> - Operations</A><DD>
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<DT><A HREF="guide11.html#S75"><B>9 </B> - Constants</A><DD>
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<DT><A HREF="guide12.html#S78"><B>10 </B> - Tokens and APIs</A><DD>
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<DT><A HREF="guide13.html#S83"><B>11 </B> - TDF transformations</A><DD>
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<DT><A HREF="guide14.html#S87"><B>12 </B> - TDF expansions of offsets</A><DD>
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<DT><A HREF="guide15.html#S89"><B>13 </B> - Models of the TDF algebra</A><DD>
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<DT><A HREF="guide16.html#S99"><B>14 </B> - Conclusion</A><DD>
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</DL>
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<HR>
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<H1><A NAME="intro">1 Introduction</A></H1>
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This memo is intended to be a fairly detailed commentary on the specification
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of TDF, a kind of Talmud to the Torah. If it conflicts with the specification
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document, it is wrong. The aim is elucidate the various constructions
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of TDF, giving examples of usages both from the point of view of a
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producer of TDF and how it is used to construct programs on particular
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platforms using various installers or translators. In addition, some
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attempt is made to give the reasons why the particular constructions
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have been chosen. Most of the commentary is a distillation of questions
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and answers raised by people trying to learn TDF from the specification
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document. <P>
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Throughout this document, references like (S5.1) are headings in the
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<A HREF="../tdf/spec1.html">TDF specification, Issue 4.0</A>. I use
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the term "compiling" or "producing" to mean the
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production of TDF from some source language and "translating"
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to mean making a program for some specific platform from TDF.<P>
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I use the first person where I am expressing my own opinions or preferences;
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these should not be taken as official opinions of DRA or the TenDRA
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team.<P>
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<HR>
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<P><I>Part of the <A HREF="../index.html">TenDRA Web</A>.<BR>Crown
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Copyright © 1998.</I></P>
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