4.5 Predeclared AADL Properties
The AADL standard defines a number of predeclared properties in two property sets called AADL_Properties and AADL_Project.  Those property sets are automatically provided as part of the OSATE installation, i.e., they do not have to be included explicitly in the workspace.  These property sets are kept in the “edu.cmu.sei.osate.workspace” plug-in in the “properties” folder both as AADL text files and as AADL XML files.  The location of the file to be used is specified in the “Window > Preferences” dialog under OSATE preferences; see Figure 11. These preferences can be set separately for each workspace. 
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Figure 11: Setting the AADL_Properties and AADL_Project property sets in the "OSATE Preferences" pane.
When loading these standard property sets OSATE will make sure it has the most up-to-date version loaded. 
Users may want to update definitions in the  AADL_Project property set with project-specific changes.  They can do so by editing the AADL_Project file in the installation area, or they can place the file in a separate area and then change the OSATE Preferences to point to it. By changing the preferences to point to this file location, this localized version of the property set will be processed instead of the default installation version.