<html xmlns="http://www.w3.org/1999/xhtml"><head></head><body><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="15" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[15]</anchor-end> <dfn><rubyb xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:"><anchor>RDFグラフ</anchor><rt xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">RDF graph</rt></rubyb></dfn>は、<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">RDF三項組</anchor>の<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">集合</anchor>です <src xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:10:"><anchor-internal xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="2" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">&gt;&gt;2</anchor-internal></src>。</p><section><h1>仕様書</h1><refs xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:"><ul xmlns="http://www.w3.org/1999/xhtml"><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="2" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[2]</anchor-end> <strong><cite xml:lang="en">RDF 1.1 Concepts and Abstract Syntax</cite> (<time>2014-04-26 05:21:08 +09:00</time> 版) <anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://dvcs.w3.org/hg/rdf/raw-file/default/rdf-concepts/index.html#dfn-rdf-graph">https://dvcs.w3.org/hg/rdf/raw-file/default/rdf-concepts/index.html#dfn-rdf-graph</anchor-external></strong></li><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="17" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[17]</anchor-end> <cite xml:lang="en">RDF 1.1 Concepts and Abstract Syntax</cite> (<time>2014-04-26 06:41:04 +09:00</time> 版) <anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://dvcs.w3.org/hg/rdf/raw-file/default/rdf-concepts/index.html#h3_graph-isomorphism">https://dvcs.w3.org/hg/rdf/raw-file/default/rdf-concepts/index.html#h3_graph-isomorphism</anchor-external></li><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="24" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[24]</anchor-end> <cite xml:lang="en">RDF 1.1 Concepts and Abstract Syntax</cite> (<time>2014-04-27 13:10:20 +09:00</time> 版) <anchor-external xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resScheme="URI" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:resParameter="https://dvcs.w3.org/hg/rdf/raw-file/default/rdf-concepts/index.html#h2_section-generalized-rdf">https://dvcs.w3.org/hg/rdf/raw-file/default/rdf-concepts/index.html#h2_section-generalized-rdf</anchor-external></li></ul></refs></section><section><h1>性質</h1><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="16" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[16]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">RDFグラフ</anchor>は<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">RDF三項組</anchor>の<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">集合</anchor>です。<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">集合</anchor>ですから、構成する<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">三項組</anchor>の順序はありません。
また、<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">三項組</anchor>の重複はありません。</p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="17" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[17]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">RDFグラフ</anchor>は、<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">空集合</anchor>となることがあります。</p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="18" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[18]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">RDFグラフ</anchor>は<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">有限集合</anchor>のようです。</p><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="25" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[25]</anchor-end> <dfn><rubyb xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">一般化 RDF グラフ<rt xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">generalized RDF graph</rt></rubyb></dfn>は、<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">一般化RDF三項組</anchor>の<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">集合</anchor>です <src xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:10:"><anchor-internal xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="24" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">&gt;&gt;24</anchor-internal></src>。</p></section><section><h1>同型性</h1><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="18" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[18]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">RDFグラフ</anchor> <var>G</var>, <var>G'</var> が<rubyb xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:"><anchor>同型</anchor><rt xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">isomorphic</rt></rubyb>であるとは、
次のような<rubyb xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:"><anchor>全単射</anchor><rt xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">bijection</rt></rubyb> <var>M</var> が存在することを言います <src xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:10:"><anchor-internal xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="17" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">&gt;&gt;17</anchor-internal></src>。<figure><ul><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="19" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[19]</anchor-end> <var>M</var> により<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">ブランク節点</anchor>が<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">ブランク節点</anchor>へと<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">写像</anchor>される</li><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="20" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[20]</anchor-end> <var>G</var> の<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">節点</anchor>であるすべての <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">RDFリテラル</anchor> <var>lit</var> について、 <code><var>M</var>(<var>lit</var>) = <var>lit</var></code>
である</li><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="21" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[21]</anchor-end> <var>G</var> の<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">節点</anchor>であるすべての <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">IRI</anchor> <var>iri</var> について、 <code><var>M</var>(<var>iri</var>) = <var>iri</var></code> である</li><li><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="22" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[22]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">三項組</anchor> <code>(<var>s</var>, <var>p</var>, <var>o</var>)</code> は <var>G'</var>
に<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">三項組</anchor> (<var>M</var>(<var>s</var>), <var>p</var>, <var>M</var>(<var>o</var>)) がある場合、その場合に限って
<var>G</var> に含まれる</li></ul></figure></p></section><section><h1>歴史</h1><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="23" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[23]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">RDFデータモデル</anchor>の項を参照してください。</p></section><section><h1>関連</h1><p><anchor-end xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:" a0:anchor="19" xmlns:a0="urn:x-suika-fam-cx:markup:suikawiki:0:9:">[19]</anchor-end> <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">RDFデータ集合</anchor>では <anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">RDFグラフ</anchor>に<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">グラフ名</anchor>が付けられることがあり、これを<anchor xmlns="urn:x-suika-fam-cx:markup:suikawiki:0:9:">名前付きグラフ</anchor>といいます。</p></section></body></html>