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/* Part of SWI-Prolog
Author: Jan Wielemaker
E-mail: J.Wielemaker@vu.nl
WWW: http://www.swi-prolog.org
Copyright (c) 2004-2015, University of Amsterdam
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/
:- module(xsdp_type,
[ xsdp_type/1, % ?Type
xsdp_uri_type/2, % ?URI, ?Type
xsdp_numeric_uri/2, % ?URI, ?Primary
xsdp_subtype_of/2, % ?Type, ?Super
xsdp_convert/3 % +Type, +Content, -Value
]).
/** <module> XML-Schema primitive types
This modules provides support for the primitive XML-Schema (XSD)
datatypes. It defines the type hierarchy which allows for reasoning over
types as well as xsdp_convert/3 to convert XML content to a natural
Prolog representation of the XSD type.
Based on the W3C definitions at
* http://www.w3.org/TR/xmlschema-2/#built-in-datatypes
The current implementation is incomplete and only there to test the API
and its integration with rdf:dataType=Type handling in the RDF parser.
The extra 'p' in the module prefix (xsdp_*) is used to allow for a
module xsd_*, providing full user-defined XSD types on top of this
module.
*/
ns('http://www.w3.org/2001/XMLSchema#').
/*******************************
* PRIMITIVE TYPE HIERARCHY *
*******************************/
%! xsdp_type(?Type)
%
% Test/generate the names for the XML schema primitive types
xsdp_type(Type) :-
subtype_of(Type, _).
%! xsdp_uri_type(?URI, ?Type)
%
% True if URI is the URI for the the XML-Schema primitive Type.
xsdp_uri_type(URI, Type) :-
xsd_local_id(URI, Type),
subtype_of(Type, _).
%! xsdp_subtype_of(?Type, ?Super)
%
% True if Type is a (transitive) subtype of Super.
xsdp_subtype_of(Type, Type) :-
subtype_of(Type, _).
xsdp_subtype_of(Type, Super) :-
( nonvar(Type)
-> subtype_of(Type, Super0),
Super0 \== (-),
xsdp_subtype_of(Super0, Super)
; nonvar(Super)
-> subtype_of(Sub0, Super),
xsdp_subtype_of(Type, Sub0)
; subtype_of(Type, _),
xsdp_subtype_of(Type, Super)
).
subtype_of(anyType, -).
subtype_of(anySimpleType, anyType).
% string hierarchy
subtype_of(string, anySimpleType).
subtype_of(normalizedString, string).
subtype_of(token, normalizedString).
subtype_of(language, token).
subtype_of('Name', token).
subtype_of('NCName', 'Name').
subtype_of('NMTOKEN', token).
subtype_of('NMTOKENS', 'NMTOKEN').
subtype_of('ID', 'NCName').
subtype_of('IDREF', 'NCName').
subtype_of('IDREFS', 'IDREF').
subtype_of('ENTITY', 'NCName').
subtype_of('ENTITIES', 'ENTITY').
% numeric hierarchy
subtype_of(decimal, anySimpleType).
subtype_of(integer, decimal).
subtype_of(nonPositiveInteger, integer).
subtype_of(negativeInteger, nonPositiveInteger).
subtype_of(long, integer).
subtype_of(int, long).
subtype_of(short, int).
subtype_of(byte, short).
subtype_of(nonNegativeInteger, integer).
subtype_of(unsignedLong, nonNegativeInteger).
subtype_of(positiveInteger, nonNegativeInteger).
subtype_of(unsignedInt, unsignedLong).
subtype_of(unsignedShort, unsignedInt).
subtype_of(unsignedByte, unsignedShort).
% other simple types
subtype_of(duration, anySimpleType).
subtype_of(dateTime, anySimpleType).
subtype_of(time, anySimpleType).
subtype_of(date, anySimpleType).
subtype_of(gYearMonth, anySimpleType).
subtype_of(gYear, anySimpleType).
subtype_of(gMonthDay, anySimpleType).
subtype_of(gDay, anySimpleType).
subtype_of(gMonth, anySimpleType).
subtype_of(boolean, anySimpleType).
subtype_of(base64Binary, anySimpleType).
subtype_of(hexBinary, anySimpleType).
subtype_of(float, anySimpleType).
subtype_of(double, anySimpleType).
subtype_of(anyURI, anySimpleType).
subtype_of('QName', anySimpleType).
subtype_of('NOTATION', anySimpleType).
%! xsdp_numeric_uri(?URI, -PromoteURI) is nondet.
%
% Table mapping all XML-Schema numeric URIs into the type they
% promote to. Types are promoted to =integer=, =float=, =double=
% and =decimal=.
term_expansion(integer_types, Clauses) :-
findall(integer_type(Type), xsdp_subtype_of(Type, integer), Clauses).
term_expansion(xsd_local_ids, Clauses) :-
ns(NS),
findall(xsd_local_id(URI, Type),
( xsdp_type(Type),
atom_concat(NS, Type, URI)
),
Clauses).
term_expansion(numeric_uirs, Clauses) :-
findall(xsdp_numeric_uri(URI, PrimaryURI),
( ( integer_type(Type), Primary = integer
; Type = float, Primary = float
; Type = double, Primary = double
; Type = decimal, Primary = decimal
),
xsd_local_id(URI, Type),
xsd_local_id(PrimaryURI, Primary)
),
Clauses).
integer_types.
xsd_local_ids.
numeric_uirs.
%! xsdp_convert(+Type, +Content, -Value)
%
% Convert the content model Content to an object of the given XSD
% type and return the Prolog value in Value.
xsdp_convert(URI, Content, Value) :-
( xsd_local_id(URI, Type)
-> convert(Type, Content, Value)
; convert(URI, Content, Value)
).
convert(anyType, Term, Term) :- !.
convert(anySimpleType, [Simple], Simple) :- !.
% strings
convert(string, [String], String) :- !.
% numbers
convert(IntType, [Text], Integer) :-
integer_type(IntType),
!,
atom_number(Text, Integer),
( integer(Integer),
validate_int_domain(IntType, Integer)
-> true
; throw(error(domain_error(Text, IntType), _))
).
convert(float, [Text], Float) :-
!,
atom_number(Text, Number),
Float is float(Number).
convert(double, [Text], Float) :-
!,
atom_number(Text, Number),
Float is float(Number).
convert(_Any, [X], X) :- !. % TBD: provide for more types
convert(_Any, X, X).
validate_int_domain(integer, _).
validate_int_domain(int, _).
validate_int_domain(long, _).
validate_int_domain(nonPositiveInteger, I) :- \+ I > 0.
validate_int_domain(negativeInteger, I) :- I < 0.
validate_int_domain(short, I) :- between(-32768, 32767, I).
validate_int_domain(byte, I) :- between(-128, 127, I).
validate_int_domain(nonNegativeInteger, I) :- \+ I < 0.
validate_int_domain(unsignedLong, I) :- I >= 0.
validate_int_domain(positiveInteger, I) :- I > 0.
validate_int_domain(unsignedInt, I) :- I >= 0.
validate_int_domain(unsignedShort, I) :- between(0, 65535, I).
validate_int_domain(unsignedByte, I) :- between(0, 255, I).
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