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ASF GitHub Bot commented on JENA-1560: -------------------------------------- Github user ajs6f commented on a diff in the pull request: https://github.com/apache/jena/pull/432#discussion_r194564667 --- Diff: jena-core/src/main/java/org/apache/jena/util/PrefixMappingUtils.java --- @@ -0,0 +1,362 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.jena.util; + +import java.util.* ; +import java.util.function.Consumer ; +import java.util.stream.Collectors ; + +import org.apache.jena.atlas.lib.SetUtils ; +import org.apache.jena.atlas.lib.Trie ; +import org.apache.jena.graph.Graph ; +import org.apache.jena.graph.Node ; +import org.apache.jena.graph.Triple ; +import org.apache.jena.graph.impl.WrappedGraph; +import org.apache.jena.rdf.model.Model ; +import org.apache.jena.shared.PrefixMapping ; +import org.apache.jena.shared.impl.PrefixMappingImpl ; + +public class PrefixMappingUtils { + /** + * Return a read-only graph that has the same data (RDF triples) as the one given, but has a + * prefix mapping that only includes "in use " prefixes. + * <p> + * The prefix mappings of the two graphs are not connected. + * Later changes to the prefix mapping of the original graph are not reflected in the returned graph. + * Modifications to the triples conatained in the underlying graph are reflected. --- End diff -- Typo "conatained" => "contained" > Prefix utilities to prune prefixes to those needed by the data. > --------------------------------------------------------------- > > Key: JENA-1560 > URL: https://issues.apache.org/jira/browse/JENA-1560 > Project: Apache Jena > Issue Type: New Feature > Components: Core > Affects Versions: Jena 3.7.0 > Reporter: Andy Seaborne > Assignee: Andy Seaborne > Priority: Minor > > Sometimes, prefixes are no longer needed by the data. They still clutter-up > output. > In long lived (persistent), the effect can build up to the point where > several 10s of prefixes are present but not used. > Some utilities to prune the unused prefixes would be useful. -- This message was sent by Atlassian JIRA (v7.6.3#76005)