Queries are a means to look for specific information in several parameter files at once. For instance, you might want to list all the pyramidal cells that you have recorded in area CA1 of the hippocampus during the course of an experiment comprising several dozens of recordings. Here is how you would proceed. Select Actions->Query. This will open a small dialog where you can type a query (in standard XQuery form) and a path, i.e. a starting directory under which all parameter files will be analyzed. In our example, you would type the following query:

//units/unit[type='PC' and structure='CA1']/*

assuming this is how you supplied information about units in the Units page. NDManager will then search parameter files for all pyramidal cells recorded from CA1, and list them graphically. The output can be saved to disk either in HTML format (which can then be viewed using any browser), or in plain text format (which can then be used as an input for batch processing scripts).