1/*  Part of SWI-Prolog
    2
    3    Author:        Jan Wielemaker
    4    E-mail:        J.Wielemaker@vu.nl
    5    WWW:           http://www.swi-prolog.org
    6    Copyright (c)  2004-2015, University of Amsterdam
    7    All rights reserved.
    8
    9    Redistribution and use in source and binary forms, with or without
   10    modification, are permitted provided that the following conditions
   11    are met:
   12
   13    1. Redistributions of source code must retain the above copyright
   14       notice, this list of conditions and the following disclaimer.
   15
   16    2. Redistributions in binary form must reproduce the above copyright
   17       notice, this list of conditions and the following disclaimer in
   18       the documentation and/or other materials provided with the
   19       distribution.
   20
   21    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   22    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   23    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   24    FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   25    COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   26    INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   27    BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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   29    CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   31    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   32    POSSIBILITY OF SUCH DAMAGE.
   33*/
   34
   35:- module(xsdp_type,
   36          [ xsdp_type/1,                % ?Type
   37            xsdp_uri_type/2,            % ?URI, ?Type
   38            xsdp_numeric_uri/2,         % ?URI, ?Primary
   39            xsdp_subtype_of/2,          % ?Type, ?Super
   40            xsdp_convert/3              % +Type, +Content, -Value
   41          ]).

   63ns('http://www.w3.org/2001/XMLSchema#').
   64
   65
   66                 /*******************************
   67                 *    PRIMITIVE TYPE HIERARCHY  *
   68                 *******************************/

 xsdp_type(?Type)

Test/generate the names for the XML schema primitive types

   74xsdp_type(Type) :-
   75    subtype_of(Type, _).

 xsdp_uri_type(?URI, ?Type)

True if URI is the URI for the the XML-Schema primitive Type.

   81xsdp_uri_type(URI, Type) :-
   82    xsd_local_id(URI, Type),
   83    subtype_of(Type, _).

 xsdp_subtype_of(?Type, ?Super)

True if Type is a (transitive) subtype of Super.

   89xsdp_subtype_of(Type, Type).
   90xsdp_subtype_of(Type, Super) :-
   91    (   nonvar(Type)
   92    ->  subtype_of(Type, Super0),
   93        Super0 \== (-),
   94        xsdp_subtype_of(Super0, Super)
   95    ;   subtype_of(Sub0, Super),
   96        xsdp_subtype_of(Type, Sub0)
   97    ).
   98
   99subtype_of(anyType,            -).
  100subtype_of(anySimpleType,      anyType).
  101                                        % string hierarchy
  102subtype_of(string,             anySimpleType).
  103subtype_of(normalizedString,   string).
  104subtype_of(token,              normalizedString).
  105subtype_of(language,           token).
  106subtype_of('Name',             token).
  107subtype_of('NCName',           'Name').
  108subtype_of('NMTOKEN',          token).
  109subtype_of('NMTOKENS',         'NMTOKEN').
  110subtype_of('ID',               'NCName').
  111subtype_of('IDREF',            'NCName').
  112subtype_of('IDREFS',           'IDREF').
  113subtype_of('ENTITY',           'NCName').
  114subtype_of('ENTITIES',         'ENTITY').
  115                                        % numeric hierarchy
  116subtype_of(decimal,            anySimpleType).
  117subtype_of(integer,            decimal).
  118subtype_of(nonPositiveInteger, integer).
  119subtype_of(negativeInteger,    nonPositiveInteger).
  120subtype_of(long,               integer).
  121subtype_of(int,                long).
  122subtype_of(short,              int).
  123subtype_of(byte,               short).
  124subtype_of(nonNegativeInteger, integer).
  125subtype_of(unsignedLong,       nonNegativeInteger).
  126subtype_of(positiveInteger,    nonNegativeInteger).
  127subtype_of(unsignedInt,        unsignedLong).
  128subtype_of(unsignedShort,      unsignedInt).
  129subtype_of(unsignedByte,       unsignedShort).
  130                                        % other simple types
  131subtype_of(duration,           anySimpleType).
  132subtype_of(dateTime,           anySimpleType).
  133subtype_of(time,               anySimpleType).
  134subtype_of(date,               anySimpleType).
  135subtype_of(gYearMonth,         anySimpleType).
  136subtype_of(gYear,              anySimpleType).
  137subtype_of(gMonthDay,          anySimpleType).
  138subtype_of(gDay,               anySimpleType).
  139subtype_of(gMonth,             anySimpleType).
  140subtype_of(boolean,            anySimpleType).
  141subtype_of(base64Binary,       anySimpleType).
  142subtype_of(hexBinary,          anySimpleType).
  143subtype_of(float,              anySimpleType).
  144subtype_of(double,             anySimpleType).
  145subtype_of(anyURI,             anySimpleType).
  146subtype_of('QName',            anySimpleType).
  147subtype_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.

  155term_expansion(integer_types, Clauses) :-
  156    findall(integer_type(Type), xsdp_subtype_of(Type, integer), Clauses).
  157term_expansion(xsd_local_ids, Clauses) :-
  158    ns(NS),
  159    findall(xsd_local_id(URI, Type),
  160            (   xsdp_type(Type),
  161                atom_concat(NS, Type, URI)
  162            ),
  163            Clauses).
  164term_expansion(numeric_uirs, Clauses) :-
  165    findall(xsdp_numeric_uri(URI, PrimaryURI),
  166            (   (   integer_type(Type),     Primary = integer
  167                ;   Type = float,           Primary = float
  168                ;   Type = double,          Primary = double
  169                ;   Type = decimal,         Primary = decimal
  170                ),
  171                xsd_local_id(URI, Type),
  172                xsd_local_id(PrimaryURI, Primary)
  173            ),
  174            Clauses).
  175
  176integer_types.
  177xsd_local_ids.
  178
  179numeric_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.

  186xsdp_convert(URI, Content, Value) :-
  187    (   xsd_local_id(URI, Type)
  188    ->  convert(Type, Content, Value)
  189    ;   convert(URI, Content, Value)
  190    ).
  191
  192convert(anyType, Term, Term) :- !.
  193convert(anySimpleType, [Simple], Simple) :- !.
  194                                        % strings
  195convert(string, [String], String) :- !.
  196                                        % numbers
  197convert(IntType, [Text], Integer) :-
  198    integer_type(IntType),
  199    !,
  200    atom_number(Text, Integer),
  201    (   integer(Integer),
  202        validate_int_domain(IntType, Integer)
  203    ->  true
  204    ;   throw(error(domain_error(Text, IntType), _))
  205    ).
  206convert(float, [Text], Float) :-
  207    !,
  208    atom_number(Text, Number),
  209    Float is float(Number).
  210convert(double, [Text], Float) :-
  211    !,
  212    atom_number(Text, Number),
  213    Float is float(Number).
  214convert(_Any, [X], X) :- !.             % TBD: provide for more types
  215convert(_Any, X, X).
  216
  217validate_int_domain(integer, _).
  218validate_int_domain(int, _).
  219validate_int_domain(long, _).
  220validate_int_domain(nonPositiveInteger, I) :- \+ I > 0.
  221validate_int_domain(negativeInteger, I) :-    I < 0.
  222validate_int_domain(short, I) :-              between(-32768, 32767, I).
  223validate_int_domain(byte,  I) :-              between(-128, 127, I).
  224validate_int_domain(nonNegativeInteger, I) :- \+ I < 0.
  225validate_int_domain(unsignedLong,       I) :- I >= 0.
  226validate_int_domain(positiveInteger,    I) :- I > 0.
  227validate_int_domain(unsignedInt,        I) :- I >= 0.
  228validate_int_domain(unsignedShort,      I) :- between(0, 65535, I).
  229validate_int_domain(unsignedByte,       I) :- between(0, 255, I)