Link:
Http://stackoverflow.com/questions/3701901/eclipse-does-not-recognize-content-of-persistence-xml
Reference:
I fixed the problem the following (i ' m using RAD v8.5.1):
. Windows--Preferences-Validation
. Scroll down to ' JPA Validator ' and click on the ellipses under Settings.
. Click on the "Add Include Group ..." button.
. Click on the new Include Group, appeared to highlight it.
. Click on the "Add Rule ..." button.
. A dialog menu pops up. Click the "Folder or file name" radio button and click on "Next".
. Click on "Browse Folder ..." and navigate to your src directory (in my case, it is "src/main/resources") within your Proje CT (my project was a, war in a multi module app) in your workspace.
. Click on "Finish".
. Click on "OK". This would prompt a full build.
The error would go away.
ECLIPSE:JPA Problem:eclipse does not recognize content of Persistence.xml