[help-recutils] regular expressions for selection expressions

[Charles Millar]

I have

%rec: foo
%mandatory: bar

bar: record1

bar: record2

bar: record3
baz: 123.89

bar: record4
baz: xyz

I want to select and print out only those records that contain baz:

Is there a regular expression that may be used in a selection expression 
such as

    -e (if baz: alnum) or (if baz: not nil) etc

so that when recsel is called in the command line (or when used in an 
org file source code block) will  result only the fields in record3 and 
record4 are printed out and no fields in record1 and record2?

Charlie Millar