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  <mainDescription>&lt;p class=&quot;MsoNormal&quot; style=&quot;MARGIN: 3pt 0cm&quot;>&#xD;
    &lt;span style=&quot;mso-bidi-language: HE&quot;>A Fact Model represents structured business vocabulary with true statement like: A&#xD;
    customer places an order. The fact model looks like the Object Role Model described by Halpin (2001). When the model&#xD;
    starts to grow the notation become quickly invisible and no more helpful, so we do not encourage to follow this&#xD;
    notation.&lt;/span> We perfer using UML class diagram showing just the entities, the associations and may be some&#xD;
    characteristic as attributes of class.&#xD;
&lt;/p>&lt;br />&#xD;
&lt;p class=&quot;MsoNormal&quot; style=&quot;MARGIN: 0cm 0cm 0pt&quot;>&#xD;
    &lt;span style=&quot;mso-bidi-font-size: 10.0pt; mso-bidi-font-family: Arial&quot;>A Fact Model should always include elementary&#xD;
    (atomic) fact type:&lt;/span>&#xD;
&lt;/p>&#xD;
&lt;p class=&quot;MsoNormal&quot; style=&quot;MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt&quot;>&#xD;
    &lt;span style=&quot;FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 10.0pt&quot;>•&lt;/span>&lt;span&#xD;
    style=&quot;FONT-SIZE: 7pt; FONT-FAMILY: 'Times New Roman'&quot;>&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&lt;/span>&#xD;
    &lt;span style=&quot;mso-bidi-font-size: 10.0pt; mso-bidi-font-family: Arial&quot;>Noun:&amp;nbsp; Customer, Order, Product&lt;/span>&#xD;
&lt;/p>&#xD;
&lt;p class=&quot;MsoNormal&quot; style=&quot;MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt&quot;>&#xD;
    &lt;span style=&quot;FONT-FAMILY: 'Times New Roman'; mso-bidi-font-size: 10.0pt&quot;>•&lt;/span>&lt;span&#xD;
    style=&quot;FONT-SIZE: 7pt; FONT-FAMILY: 'Times New Roman'&quot;>&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;&lt;/span>&#xD;
    &lt;span style=&quot;mso-bidi-font-size: 10.0pt; mso-bidi-font-family: Arial&quot;>Verb:&amp;nbsp; places, briefs&lt;/span>&#xD;
&lt;/p></mainDescription>
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