Enter a directory and a file pattern. The directory field has a help list which is set with the various directory entered in the preference dialog.
Enter here a list of words separated with a space. A check-box lets you control the selectivity of the search (Only package matching all keywords).
A package contains several sections. You can search in the section you want. Here a small description of each:
This is a one line description of the package.
This is a longer text presenting the package.
This is the list of all file (directory and file) member of the package. The various file paths are compared with the keywords.
This is a list of package dependancies (what is needed by the package to install and operate normally). This might be used as a quick way to find out which packages need a given library for example.
This lists the service delivered by the package. This list corresponds to libraries and utilities.