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a few typos corrected

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git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@82 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
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stasinos 2001-06-12 14:07:59 +00:00
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docs/yap.tex
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@ -1,4 +1,4 @@
\input texinfo @c -*-texinfo-*- \input texinfo @c -*- mode: texinfo; coding: latin-1; -*-
@c %**start of header @c %**start of header
@setfilename yap.info @setfilename yap.info
@ -7381,10 +7381,10 @@ number is Operating System dependent.
@cnindex file_property/2 @cnindex file_property/2
The atom @var{File} corresponds to an existing file, and @var{Property} The atom @var{File} corresponds to an existing file, and @var{Property}
will be unified with a property of this file. The poperties are of the will be unified with a property of this file. The poperties are of the
form @code{type(@var{Type))}, which gives whether the file is a regular form @code{type(@var{Type})}, which gives whether the file is a regular
file, a directory, a fifo file, or of unknown type; file, a directory, a fifo file, or of unknown type;
@code{size(@var{Size))}, with gives the size for a file, and @code{size(@var{Size})}, with gives the size for a file, and
@code{mod_time(@var{Time))}, which gives the last time a file was @code{mod_time(@var{Time})}, which gives the last time a file was
modified according to some Operating System dependent modified according to some Operating System dependent
timestamp. Properties can be obtained through backtracking: timestamp. Properties can be obtained through backtracking:
@ -8048,13 +8048,13 @@ suspended.
YAP now supports the attributed variables packaged developed at OFAI by YAP now supports the attributed variables packaged developed at OFAI by
Christian Holzbaur. Attributes are a means of declaring that an Christian Holzbaur. Attributes are a means of declaring that an
arbitrary term is a property for a variable. These properties can be arbitrary term is a property for a variable. These properties can be
update during forward execution. Moreover, the unification algorithm is updated during forward execution. Moreover, the unification algorithm is
aware of attributed variables and will call user defined handlers when aware of attributed variables and will call user defined handlers when
trying to unify these variables. trying to unify these variables.
Attributed variables provide an elegant abstraction over which one can Attributed variables provide an elegant abstraction over which one can
extend Prolog systems. Their main application so far has been in extend Prolog systems. Their main application so far has been in
implement constraint handlers, such as Holzbaur's CLPQR and Fruewirth implementing constraint handlers, such as Holzbaur's CLPQR and Fruewirth
and Holzbaur's CHR, but other applications have been proposed in the and Holzbaur's CHR, but other applications have been proposed in the
literature. literature.
@ -8108,7 +8108,7 @@ where each @var{AttributeSpec} has the form (@var{Name}/@var{Arity}).
One single such declaration is allowed per module @var{Module}. One single such declaration is allowed per module @var{Module}.
Although the YAP module system is predicate based, attributes are local Although the YAP module system is predicate based, attributes are local
to modules. This is is implemented by rewriting all calls to the to modules. This is implemented by rewriting all calls to the
builtins that manipulate attributes so that attribute names are builtins that manipulate attributes so that attribute names are
preprocessed depending on the module. The @code{user:goal_expansion/3} preprocessed depending on the module. The @code{user:goal_expansion/3}
mechanism is used for this purpose. mechanism is used for this purpose.
@ -8220,8 +8220,8 @@ a @var{Goal}. Should fail when no interpretation is available.
@node Projecting Attributes, Attribute Examples, Displaying Attributes, Attributed Variables @node Projecting Attributes, Attribute Examples, Displaying Attributes, Attributed Variables
Constraint solvers must be able project a set of constraints to a set of Constraint solvers must be able to project a set of constraints to a set
variables. This is useful when displaying the solution to a goal, but of variables. This is useful when displaying the solution to a goal, but
may also be used to manipulate computations. The user-defined may also be used to manipulate computations. The user-defined
@code{project_attributes/2} is responsible for implementing this @code{project_attributes/2} is responsible for implementing this
projection. projection.
@ -8253,7 +8253,7 @@ and these constraints are the ones that will have an
@node Attribute Examples, ,Projecting Attributes, Attributed Variables @node Attribute Examples, ,Projecting Attributes, Attributed Variables
The following two examples example is taken from the SICStus Prolog manual. It The following two examples example is taken from the SICStus Prolog manual. It
sketchs the implementation of simple a finite domain ``solver''. Note sketches the implementation of a simple finite domain ``solver''. Note
that an industrial strength solver would have to provide a wider range that an industrial strength solver would have to provide a wider range
of functionality and that it quite likely would utilize a more efficient of functionality and that it quite likely would utilize a more efficient
representation for the domains proper. The module exports a single representation for the domains proper. The module exports a single
@ -8317,7 +8317,7 @@ domain(X, List) :-
Note that the ``implied binding'' @code{Other=El} was deferred until after Note that the ``implied binding'' @code{Other=El} was deferred until after
the completion of @code{verify_attribute/3}. Otherwise, there might be a the completion of @code{verify_attribute/3}. Otherwise, there might be a
danger of recursively invoke @code{verify_attribute/3}, which might bind danger of recursively invoking @code{verify_attribute/3}, which might bind
@code{Var}, which is not allowed inside the scope of @code{verify_attribute/3}. @code{Var}, which is not allowed inside the scope of @code{verify_attribute/3}.
Deferring unifications into the third argument of @code{verify_attribute/3} Deferring unifications into the third argument of @code{verify_attribute/3}
effectively serializes th calls to @code{verify_attribute/3}. effectively serializes th calls to @code{verify_attribute/3}.
@ -13046,5 +13046,3 @@ The following is the list of the declarations of the predefined operators:
@contents @contents
@bye @bye