What is the difference between "someValuesFrom" and "allValuesFrom"?

Posted by ahmed on Stack Overflow See other posts from Stack Overflow or by ahmed
Published on 2009-05-27T06:33:49Z Indexed on 2010/05/20 20:50 UTC
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In descriptive logic, what is the difference between "someValuesFrom" and "allValuesFrom"? In other words, the difference between (limited existential quantification) and (value restriction).

For example, consider this picture:

alt text

I have used the photoshop because I can't write some symbols.

Is there any way to simplify the concept of somevaluefrom and allvaluesfrom?

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