T-shirt model

<HEAD>
<TITLE>T-shirt model</TITLE>
</HEAD>
<H2>Model of a t-shirt collection</H2>
 
Here is the t-shirt model introduced in the previous section. Compare
its layout with what I said about my view of t-shirts. I have used
spaces only (no tabs) for indentation.

<PRE>
?TShirt  Characteristics  Color Background Red
                                           Green
                                           Purple
                                           Grey
                                           Blue
                                Faded
                                Blotched
                          Size UNIQUE Int
                          Graphics Front UNIQUE Text
                                   Back UNIQUE Text
                                   Sleeves UNIQUE Text
                          Composition ?Country #Components
                          Resembles ?TShirt
         History  Price Float
                  Purchased Year Int
                            Source Store UNIQUE ?Store
                                   Manufacturer UNIQUE ?Manufacturer
                  Borrowed_by ?Person XREF Shirt
                  Damage Text Text //description and date
                  Disposal UNIQUE Int UNIQUE Text
//should I move Remarks up to next level? 
                  Remarks Text
         Wear_on_days Int REPEAT //days of months to be worn
</PRE>

What follows is a detailed look at the components of the model along
with valid (and invalid) variations. I will also introduce other
models that help support this one.<P>

Back to <A HREF="toc_models.html">Table of Contents</A><P>