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Annotations can be added to resources in the workspace by creating <tt>IMarker</tt> objects. These markers are used to represent compile errors, to-do items, bookmarks, search results, and many other types of annotations. You can create your own marker types for storing annotations for use by your own plug-in. Each marker can store an arbitrary set of attributes. Attributes are keyed by a string, and the values can be strings, Booleans, or integers. The <tt>IMarker</tt> interface defines some common attribute types, but you are free to create your own attribute names for your markers. Here is an example snippet that creates a marker, adds some attributes, and then deletes it: <pre> final IFile file = null; IMarker marker = file.createMarker(IMarker.MARKER); marker.setAttribute(IMarker.MESSAGE, "This is my marker"); marker.setAttribute("Age", 5); marker.delete(); </pre> When markers are created, modified, or deleted, a resource change event will be broadcast, telling interested parties about the change. You can search for markers by using the <tt>findMarkers</tt> methods on <tt>IResource</tt>. The <tt>org.eclipse.core.resources.markers</tt> extension point can be used to declaratively define new marker types. See its documentation for an explanation and examples. == See Also: == *[[FAQ How can I be notified of changes to the workspace?]] *[[FAQ Why don't my markers appear in the editor's vertical ruler?]] *[[FAQ How do I create problem markers for my compiler?]] *Go to '''Platform Plug-in Developer Guide &gt; Programmer&#146;s Guide &gt; Resources overview &gt; Resource markers''' *Eclipse online article [http://www.eclipse.org/articles/Article-Mark%20My%20Words/mark-my-words.html "Mark My Words"] {{Template:FAQ_Tagline}}

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