Extract template naming conventions.

The extract header records have these names:
HEADER-DYNAMIC
Dynamic PSB header record
HEADER1-STATIC
Static PSB first header record
HEADER2-STATIC
Static PSB subsequent header record
The extracted IMS segment records have this naming convention:
dbd-segment-01name
where:
dbd
The DBD name.
segment
The segment name.
01name
The name of the 01 layout describing this segment as given in the originating template.
Note: The dash separator ("-") is replaced with an underscore ("_") when the originating IMS templates are built from PL/I copybooks.