Michael Peter Christen
13 years ago
parent
9cd36b4c44
commit
8d2cbfb685
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/**
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* Literal
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* Copyright 2011 by Michael Peter Christen, mc@yacy.net, Frankfurt am Main, Germany
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* First released 18.12.2011 at http://yacy.net
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*
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* $LastChangedDate: 2011-04-14 00:04:23 +0200 (Do, 14 Apr 2011) $
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* $LastChangedRevision: 7653 $
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* $LastChangedBy: orbiter $
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.yacy.cora.lod;
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import java.util.regex.Pattern;
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import net.yacy.cora.document.MultiProtocolURI;
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/**
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* A literal is the possible value for a predicate.
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* A set of literals is the norm of a predicate.
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* Each literal can have an attached explanation which we express
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* as a link to the resource that explains the literal.
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*/
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public interface Literal {
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/**
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* the terminal is the actual content of the property and also
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* the visual representation of the content of a property if the
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* literal is assigned to that property.
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* @return a string representing the literal
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*/
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public String getTerminal();
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/**
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* the subject of a literal is a reference to a resource that
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* explains the literal. If an object has attached properties
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* from different vocabularies and properties assigned to the
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* object have actual literal instances assigned, then the set
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* of subjects of these literals explain the object as a co-notation
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* to knowledge. Subjects of literals shall therefore be
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* knowledge authorities for the predicates where the literal is
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* assigned.
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* @return an url to a knowledge authority for the literal
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*/
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public MultiProtocolURI getSubject();
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/**
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* if a resource is poorly annotated with metadata an it shall
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* be automatically annotated, then the terminal of a literal
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* may be too weak to discover literals in the resource. An additional
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* discovery pattern may help to reduce the set of literals that can
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* be discovered automatically. A discovery pattern is then not
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* a replacement of the terminal itself, it is an additional pattern
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* that must occur also in the resource where also the terminal of
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* the literal appears. If the terminal itself is sufficient to discover
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* the literal, then the discovery pattern may be a catch-all '.*' pattern.
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* @return the discovery pattern to identify the literal in the resource.
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*/
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public Pattern getDiscoveryPattern();
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}
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@ -0,0 +1,78 @@
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/**
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* Syntax
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* Copyright 2011 by Michael Peter Christen, mc@yacy.net, Frankfurt am Main, Germany
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* First released 17.12.2011 at http://yacy.net
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*
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* $LastChangedDate: 2011-04-14 00:04:23 +0200 (Do, 14 Apr 2011) $
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* $LastChangedRevision: 7653 $
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* $LastChangedBy: orbiter $
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.yacy.cora.lod;
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import java.util.HashMap;
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import java.util.Map;
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import net.yacy.cora.lod.vocabulary.CreativeCommons;
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import net.yacy.cora.lod.vocabulary.DublinCore;
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import net.yacy.cora.lod.vocabulary.Foaf;
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import net.yacy.cora.lod.vocabulary.Geo;
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import net.yacy.cora.lod.vocabulary.HttpHeader;
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import net.yacy.cora.lod.vocabulary.Rdf;
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import net.yacy.cora.lod.vocabulary.YaCyMetadata;
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/**
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* helper class to understand xml tags and vocabularies
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*/
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public class Syntax {
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private final static Class<?>[] vocabularies = new Class<?>[]{
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CreativeCommons.class,
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DublinCore.class,
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Foaf.class,
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Geo.class,
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HttpHeader.class,
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Rdf.class,
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YaCyMetadata.class
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};
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private final static Map<String, Vocabulary> tagMap = new HashMap<String, Vocabulary>();
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static {
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Vocabulary voc;
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for (Class<?> v: vocabularies) {
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Object[] cs = v.getEnumConstants();
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for (Object c: cs) {
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voc = (Vocabulary) c;
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tagMap.put(voc.getPredicate(), voc);
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}
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}
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}
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/**
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* recognizer for vocabulary tag names
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* @param tag
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* @return the vocabulary object for the given tag
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*/
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public static Vocabulary getVocabulary(String tag) {
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return tagMap.get(tag);
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}
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public static void main(String[] args) {
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System.out.println(tagMap);
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}
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}
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@ -0,0 +1,138 @@
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/**
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* CreativeCommons
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* Copyright 2011 by Michael Peter Christen, mc@yacy.net, Frankfurt am Main, Germany
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* First released 17.12.2011 at http://yacy.net
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*
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* $LastChangedDate: 2011-04-14 00:04:23 +0200 (Do, 14 Apr 2011) $
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* $LastChangedRevision: 7653 $
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* $LastChangedBy: orbiter $
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.yacy.cora.lod.vocabulary;
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import java.net.MalformedURLException;
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import java.util.HashSet;
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import java.util.Set;
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import java.util.regex.Pattern;
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import net.yacy.cora.document.MultiProtocolURI;
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import net.yacy.cora.lod.Literal;
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import net.yacy.cora.lod.Vocabulary;
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/**
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* a vocabulary for creative commons license declarations. see:
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* http://creativecommons.org/ns#
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*/
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public enum CreativeCommons implements Vocabulary {
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// License Properties
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permits(new Literal[]{
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PermitLiteral.Reproduction,
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PermitLiteral.Distribution,
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PermitLiteral.DerivativeWorks,
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PermitLiteral.Sharing}),
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requires,
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prohibits,
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jurisdiction,
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legalcode,
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deprecatedOn,
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// Work Properties
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license,
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morePermissions,
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attributionName,
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attributionURL,
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useGuidelines;
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enum PermitLiteral implements Literal {
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Reproduction("Reproduction", null, ".*"),
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Distribution("Distribution", null, ".*"),
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DerivativeWorks("Derivative Works",null, ".*"),
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Sharing("Sharing", null, ".*");
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String terminal;
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MultiProtocolURI subject;
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Pattern discoveryPattern;
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private PermitLiteral(
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String terminal,
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String subject,
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String discoveryPattern) {
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this.terminal = terminal;
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try {
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this.subject = subject == null ? null : new MultiProtocolURI(subject);
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} catch (MalformedURLException e) {
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this.subject = null;
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}
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this.discoveryPattern = Pattern.compile(discoveryPattern == null ? ".*" : discoveryPattern);
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}
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@Override
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public String getTerminal() {
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return this.terminal;
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}
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@Override
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public MultiProtocolURI getSubject() {
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return this.subject;
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}
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@Override
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public Pattern getDiscoveryPattern() {
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return this.discoveryPattern;
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}
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}
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public final static String IDENTIFIER = "http://dublincore.org/documents/2010/10/11/dces/";
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public final static String PREFIX = "cc";
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private final String predicate;
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private final Set<Literal> literals;
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private CreativeCommons() {
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this.predicate = PREFIX + ":" + this.name();
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this.literals = null;
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}
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private CreativeCommons(Literal[] literals) {
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this.predicate = PREFIX + ":" + this.name();
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this.literals = new HashSet<Literal>();
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for (Literal l: literals) this.literals.add(l);
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}
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@Override
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public String getIdentifier() {
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return IDENTIFIER;
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}
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@Override
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public String getPrefix() {
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return PREFIX;
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}
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@Override
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public Set<Literal> getLiterals() {
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return null;
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}
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@Override
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public String getPredicate() {
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return this.predicate;
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}
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}
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@ -0,0 +1,62 @@
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/**
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* Foaf
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* Copyright 2011 by Michael Peter Christen, mc@yacy.net, Frankfurt am Main, Germany
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* First released 17.12.2011 at http://yacy.net
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*
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* $LastChangedDate: 2011-04-14 00:04:23 +0200 (Do, 14 Apr 2011) $
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* $LastChangedRevision: 7653 $
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* $LastChangedBy: orbiter $
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program in the file lgpl21.txt
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.yacy.cora.lod.vocabulary;
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import java.util.Set;
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import net.yacy.cora.lod.Literal;
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import net.yacy.cora.lod.Vocabulary;
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/**
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* The friend of a friend vocabulary. see:
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* http://xmlns.com/foaf/spec/
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*/
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public enum Foaf implements Vocabulary {
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;
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@Override
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public String getIdentifier() {
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// TODO Auto-generated method stub
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return null;
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}
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@Override
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public String getPrefix() {
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// TODO Auto-generated method stub
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return null;
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}
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@Override
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public Set<Literal> getLiterals() {
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return null;
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}
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@Override
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public String getPredicate() {
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// TODO Auto-generated method stub
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return null;
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}
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}
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@ -0,0 +1,69 @@
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/**
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* Rdf
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* Copyright 2011 by Michael Peter Christen, mc@yacy.net, Frankfurt am Main, Germany
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* First released 17.12.2011 at http://yacy.net
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*
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* $LastChangedDate: 2011-04-14 00:04:23 +0200 (Do, 14 Apr 2011) $
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* $LastChangedRevision: 7653 $
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* $LastChangedBy: orbiter $
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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||||
* License as published by the Free Software Foundation; either
|
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
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||||
*
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||||
* You should have received a copy of the GNU Lesser General Public License
|
||||
* along with this program in the file lgpl21.txt
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||||
* If not, see <http://www.gnu.org/licenses/>.
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||||
*/
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package net.yacy.cora.lod.vocabulary;
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import java.util.Set;
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import net.yacy.cora.lod.Literal;
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import net.yacy.cora.lod.Vocabulary;
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public enum Rdf implements Vocabulary {
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RDF,
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Description,
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Bag,
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Seq,
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Alt;
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public final static String IDENTIFIER = "http://www.w3.org/1999/02/22-rdf-syntax-ns#";
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public final static String PREFIX = "rdf";
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private final String predicate;
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private Rdf() {
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this.predicate = PREFIX + ":" + this.name();
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}
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@Override
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public String getIdentifier() {
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return IDENTIFIER;
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}
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@Override
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public String getPrefix() {
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return PREFIX;
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}
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@Override
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public Set<Literal> getLiterals() {
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return null;
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}
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@Override
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public String getPredicate() {
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return this.predicate;
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}
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}
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Loading…
Reference in new issue