NMRWish Built-In TCL Functions
gdbGet: Extract the value associated with a database cell, which is a particular value in a table, specified by its entry (row) and variable (column).

Get/Test the value of cells by their variables:   gdbGet entry varNameOrHandleList [-notrim] Notes:   1. No value is returned for variables which are   not valid or not found in the given entry.   2. Use back-quoted variable names to allow   matching by regular expression (i.e. `HN_.*`).