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9. Flex Predicates 146<br />
new_synonym( weight_calc, its(volume)*its(density) ) .<br />
new_template(+Name,+Positive,+Negative)<br />
Add the Positive and Negative templates for Name to the workspace.<br />
This will not overwrite any existing templates for that Name, but will append<br />
onto them.<br />
Templates are used as a method of distributing the predicate Name amongst<br />
the arguments of a relation. This will hopefully assist the readability of KSL<br />
sentences.<br />
A template is a non-empty list of partitions, where each partition is a<br />
(possibly empty) list of words. The border between one partition and the<br />
next indicates an argument position. There will always be one more partition<br />
in a template than there are argument positions.<br />
Examples<br />
new_template(ontopof,<br />
[[block],[is,on,top,of,block],[]],<br />
[[block],[is,not,on,top,of,block],[]] )<br />
new_value( +Slot,+Term )<br />
The given Term is first dereferenced down to some Value.<br />
If the Slot is a compound term of the form @(Attribute,Frame) then<br />
the following call is made :<br />
new_slot( Attribute, Frame, Value) .<br />
Otherwise, if the Slot is the name of a global variable then the following<br />
call is made:<br />
new_slot( Slot, global, Value) .<br />
The frame global is a special frame reserved for the value of global<br />
variables.<br />
Example<br />
new_value( @(contents,jugB), @(capacity,jugB) ) .<br />
new_value( temperature, boiling_point) .<br />
new_watchdog( +Name,?Attribute,?Frame,+Context,+Check,+Action )<br />
Create (or update if the Name already exists) a watchdog procedure which<br />
controls the access to a slot (see isa_slot/3).<br />
6<br />
<strong>flex</strong> toolkit<br />
The Check (a Prolog call) is performed whenever there is a request for the
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