#725: Migrate display-property-updates.apt to Markdown

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+title: Checking for new property-linked updates
+author: Stephen Connolly
+date: 2009-08-12
+
+<!---
+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
+  https://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.
+-->
+
+# Checking for new property-linked updates
+
+The `display-property-updates` goal will check all the properties in your project and display a list
+of those properties which are used to control versions of dependencies, plugins and plugin dependencies and
+it will detail which properties have newer versions available.
+
+Here are some examples of what this looks like:
+
+```sh
+svn checkout http://svn.codehaus.org/mojo/trunk/mojo/build-helper-maven-plugin build-helper-maven-plugin
+cd build-helper-maven-plugin
+mvn versions:display-property-updates
+```
+
+Which produces the following output:
+
+```log
+[INFO] ------------------------------------------------------------------------
+[INFO] Building Build Helper Maven Plugin
+[INFO]    task-segment: [versions:display-property-updates]
+[INFO] ------------------------------------------------------------------------
+[INFO] [versions:display-property-updates]
+[INFO]
+[INFO] This project does not have any properties associated with versions.
+[INFO]
+[INFO] ------------------------------------------------------------------------
+[INFO] BUILD SUCCESSFUL
+[INFO] ------------------------------------------------------------------------
+[INFO] Total time: 6 seconds
+[INFO] Finished at: Wed Aug 12 13:28:04 BST 2009
+[INFO] Final Memory: 11M/22M
+[INFO] ------------------------------------------------------------------------
+```
+
+Another example, using a project which uses properties to control the version of multiple artifacts:
+
+```sh
+svn checkout http://svn.codehaus.org/mojo/trunk/mojo/versions-maven-plugin versions-maven-plugin
+cd versions-maven-plugin
+mvn versions:display-property-updates
+```
+
+Which produces the following output:
+
+```log
+[INFO] ------------------------------------------------------------------------
+[INFO] Building Versions Maven Plugin
+[INFO]    task-segment: [versions:display-property-updates]
+[INFO] ------------------------------------------------------------------------
+[INFO] [versions:display-property-updates]
+[INFO]
+[INFO] The following version property updates are available:
+[INFO]   ${doxiaVersion} ........................................ 1.0 -> 1.1.1
+[INFO]   ${doxia-sitetoolsVersion} .............................. 1.0 -> 1.1.1
+[INFO]
+[INFO] ------------------------------------------------------------------------
+[INFO] BUILD SUCCESSFUL
+[INFO] ------------------------------------------------------------------------
+[INFO] Total time: 6 seconds
+[INFO] Finished at: Wed Aug 12 13:28:49 BST 2009
+[INFO] Final Memory: 11M/24M
+[INFO] ------------------------------------------------------------------------
+```