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+% Copyright 2018 by Till Tantau
+%
+% This file may be distributed and/or modified
+%
+% 1. under the LaTeX Project Public License and/or
+% 2. under the GNU Public License.
+%
+% See the file doc/generic/pgf/licenses/LICENSE for more details.
+
+\ProvidesFileRCS{tikzlibraryrdf.code.tex}
+
+
+
+\def\tikz@add@rdf@pre@option#1{\expandafter\def\expandafter\tikz@rdf@pre@options\expandafter{\tikz@rdf@pre@options#1}}%
+\def\tikz@add@rdf@post@option#1{\expandafter\def\expandafter\tikz@rdf@post@options\expandafter{\tikz@rdf@post@options#1}}%
+
+\let\tikz@rdf@pre@options\pgfutil@empty
+\let\tikz@rdf@post@options\pgfutil@empty
+
+\tikzset{
+ %
+ % Switching on the engine
+ %
+ rdf engine on/.code={%
+ \def\tikz@clear@rdf@options{\let\tikz@rdf@pre@options\pgfutil@empty\let\tikz@rdf@post@options\pgfutil@empty}%
+ \def\tikz@do@rdf@pre@options{\tikz@rdf@pre@options\let\tikz@rdf@pre@options\pgfutil@empty}%
+ \def\tikz@do@rdf@post@options{\tikz@rdf@post@options\let\tikz@rdf@post@options\pgfutil@empty}%
+ \pgfkeys{/tikz/rdf engine/.code=\tikz@add@rdf@pre@option{\pgfqkeys{/tikz/rdf engine}{##1}}}%
+ },
+ rdf engine/.cd,
+ %
+ every statement/.style=,
+ %
+ % Namespaces
+ %
+ prefix/.code=\pgfrdfprefix{#1},
+ %
+ % Core commands
+ %
+ statement/.code={%
+ {%
+ \pgfkeys{/tikz/rdf engine/every statement}%
+ \pgfqkeys{/tikz/rdf engine/statements}{#1}%
+ \iftikz@rdf@is@a@container\tikz@rdf@init@container\fi%
+ \iftikz@rdf@is@a@member\tikz@rdf@make@member\fi%
+ \tikz@rdf@make@triple%
+ \expandafter}\tikz@rdf@action%
+ },
+ get scope curie/.code={%
+ \ifx\tikz@id@name\pgfutil@empty%
+ \def\tikz@id@name{@rdf}%
+ \fi%
+ \pgfidrefnextuse\tikz@temp{\tikz@id@name}%
+ \edef#1{\tikzrdfhashmark\tikz@temp}%
+ },
+ get new resource curie/.code={%
+ \pgfsys@new@id\tikz@temp%
+ \edef#1{\tikzrdfhashmark\tikz@temp}%
+ },
+ scope is new context/.style={get scope curie=\tikzrdfcontext}
+}%
+
+\def\tikzrdfcontext{\tikzrdfhashmark}%empty by default
+
+\tikzset{
+ rdf engine/statements/.cd,
+ %
+ % Core properties of statements
+ %
+ subject/.code={%
+ \def\tikz@rdf@target{\tikz@rdf@subject}%
+ \tikz@rdf@parse{#1}%
+ },
+ predicate/.code={%
+ \def\tikz@rdf@target{\tikz@rdf@predicate}%
+ \tikz@rdf@parse{#1}%
+ },
+ object/.code={%
+ \let\tikz@rdf@object@literal\relax%
+ \let\tikz@rdf@object\relax%
+ \def\tikz@temp{#1}%
+ \ifx\tikz@temp\tikz@rdf@current@scope@text%
+ \tikz@rdf@object@scope@contenttrue%
+ \else%
+ \tikz@rdf@object@scope@contentfalse%
+ \def\tikz@rdf@target{\tikz@rdf@object}%
+ \tikz@rdf@parse{#1}%
+ \fi%
+ },
+ %
+ % Shorthands
+ %
+ has type/.style={predicate=rdf:type,object={#1}},
+ %
+ % Containers
+ %
+ is a bag/.style={has type=rdf:Bag, is a container},
+ is a sequence/.style={has type=rdf:Seq, is a container},
+ is an alternative/.style={has type=rdf:Alt, is a container},
+ %
+ is a container/.code={\tikz@rdf@is@a@containertrue},
+ %
+ has as member/.code={\tikz@rdf@is@a@membertrue},%
+}%
+
+\def\tikz@rdf@current@scope@text{scope content}%
+
+\let\tikz@rdf@subject\relax
+\let\tikz@rdf@predicate\pgfutil@empty
+\let\tikz@rdf@object\relax
+\let\tikz@rdf@object@literal\relax
+\let\tikz@rdf@container\relax
+
+\newif\iftikz@rdf@object@scope@content
+\newif\iftikz@rdf@is@a@container
+\newif\iftikz@rdf@is@a@member
+
+
+\def\tikz@rdf@parse#1{%
+ \edef\tikz@temp{#1}%
+ \expandafter\tikz@rdf@parse@#1\relax%
+}%
+
+\def\tikz@rdf@parse@{%
+ \pgfutil@ifnextchar({\tikz@rdf@parse@name}{%)
+ \pgfutil@ifnextchar"{\tikz@rdf@parse@literals}{%
+ \tikz@rdf@parse@curie%
+ }%
+ }%
+}%
+
+\def\tikz@rdf@parse@name(#1)\relax{%
+ \pgfidrefprevuse\tikz@rdf@the@id{#1}\expandafter\edef\tikz@rdf@target{\tikzrdfhashmark\tikz@rdf@the@id}%
+}%
+\def\tikz@rdf@parse@literals"#1"{%
+ \ifx\tikz@rdf@target\tikz@rdf@object@name%
+ \def\tikz@rdf@object@literal{#1}%
+ \else%
+ \tikzerror{Only RDF objects can be literals}%
+ \fi%
+ \pgfutil@ifnextchar\relax\pgfutil@gobble\tikz@rdf@parse@literals@rest%
+}%
+\def\tikz@rdf@parse@literals@rest and scope content\relax{%
+ \tikz@rdf@object@scope@contenttrue%
+}%
+
+\def\tikz@rdf@object@name{\tikz@rdf@object}%
+\def\tikz@rdf@parse@curie#1\relax{%
+ \expandafter\def\tikz@rdf@target{#1}%
+}%
+
+{%
+ \catcode`\#=11
+ \gdef\tikzrdfhashmark{#}%
+}%
+
+
+\def\tikz@rdf@make@triple{%
+ % First, ensure that subject, predicate and object are set:
+ \ifx\tikz@rdf@subject\relax%
+ \tikzerror{RDF statement misses subject}%
+ \else%
+ \ifx\tikz@rdf@predicate\relax%
+ \tikzerror{RDF statement misses predicate}%
+ \else%
+ \iftikz@rdf@object@scope@content%
+ \edef\tikz@marshal{\noexpand\tikz@rdf@make@content@triple{\tikz@rdf@subject}{\tikz@rdf@predicate}{\tikz@rdf@object@literal}}%
+ \tikz@marshal%
+ \else%
+ \ifx\tikz@rdf@object\relax%
+ \ifx\tikz@rdf@object@literal\relax%
+ \tikzerror{RDF statement misses object}%
+ \else%
+ \edef\tikz@marshal{\noexpand\tikz@rdf@make@literal@triple{\tikz@rdf@subject}{\tikz@rdf@predicate}{\tikz@rdf@object@literal}}%
+ \tikz@marshal%
+ \fi%
+ \else%
+ \edef\tikz@marshal{\noexpand\tikz@rdf@make@normal@triple{\tikz@rdf@subject}{\tikz@rdf@predicate}{\tikz@rdf@object}}%
+ \tikz@marshal%
+ \fi%
+ \fi%
+ \fi%
+ \fi%
+}%
+
+\def\tikz@rdf@make@content@triple#1#2#3{%
+ \def\tikz@rdf@action{%
+ \def\tikz@rdf@invoke@code{%
+ \def\tikz@temp{#3}%
+ \ifx\tikz@temp\tikz@rdf@object@literal@text\else%
+ \pgfrdfcontent{#3}%
+ \fi%
+ \pgfrdfabout{#1}%
+ \pgfrdfdatatype{rdf:XMLLiteral}%
+ \foreach \tikz@rdf@pred in {#2}{%
+ \ifx\tikz@rdf@pred\pgfutil@empty\else%
+ \expandafter\pgfrdfproperty\expandafter{\tikz@rdf@pred}%
+ \fi%
+ }%
+ }%
+ }%
+}%
+
+\def\tikz@rdf@make@literal@triple#1#2#3{%
+ \def\tikz@rdf@action{%
+ \tikz@add@rdf@post@option{%
+ {%
+ \pgfrdfabout{#1}%
+ \foreach \tikz@rdf@pred in {#2}{%
+ \ifx\tikz@rdf@pred\pgfutil@empty\else%
+ \expandafter\pgfrdfproperty\expandafter{\tikz@rdf@pred}%
+ \fi%
+ }%
+ \pgfrdfcontent{#3}%
+ \pgfidscope%
+ \endpgfidscope%
+ }%
+ }%
+ }%
+}%
+
+\def\tikz@rdf@make@normal@triple#1#2#3{%
+ \def\tikz@rdf@action{%
+ \tikz@add@rdf@post@option{%
+ {%
+ \pgfrdfabout{#1}%
+ \foreach \tikz@rdf@pred in {#2}{%
+ \ifx\tikz@rdf@pred\pgfutil@empty\else%
+ \expandafter\pgfrdfproperty\expandafter{\tikz@rdf@pred}%
+ \fi%
+ }%
+ \pgfrdfresource{#3}%
+ \pgfidscope%
+ \endpgfidscope%
+ }%
+ }%
+ }%
+}%
+
+\def\tikz@rdf@object@literal@text{\tikz@rdf@object@literal}%
+
+
+
+
+% Containers
+
+\def\tikz@rdf@init@container{%
+ \ifx\tikz@rdf@subject\relax%
+ \tikzerror{RDF statement misses subject}%
+ \else%
+ \expandafter\gdef\csname tikz@rdf@c@\tikz@rdf@subject\endcsname{0}%
+ \fi%
+}%
+
+
+\def\tikz@rdf@make@member{%
+ \ifx\tikz@rdf@subject\relax%
+ \tikzerror{RDF statement misses subject}%
+ \else%
+ % Get number:
+ \expandafter\let\expandafter\tikz@temp\csname tikz@rdf@c@\tikz@rdf@subject\endcsname%
+ \ifx\tikz@temp\relax%
+ \tikzerror{RDF subject is not a container}%
+ \else%
+ \c@pgf@counta\tikz@temp%
+ \advance\c@pgf@counta by1\relax%
+ \expandafter\xdef\csname tikz@rdf@c@\tikz@rdf@subject\endcsname{\the\c@pgf@counta}%
+ \edef\tikz@rdf@predicate{rdf:_\the\c@pgf@counta}%
+ \fi%
+ \fi%
+}%
+
+
+
+
+
+% Hooks:
+
+\let\tikz@rdf@invoke@code\relax
+
+\def\tikz@rdf@id@hook{%
+ \tikz@rdf@invoke@code%
+ \let\tikz@rdf@invoke@code\relax%
+}%
+
+% Add hook:
+\expandafter\def\expandafter\tikz@id@hook\expandafter{\tikz@id@hook\tikz@rdf@id@hook}%
+
+
+
+\endinput