[NOTE] (whatscooking): issue8: notes regarding hdr.h from Seismic Unix

issue8_libdatrwxx_handle_full_SeismicUnix_headers.txt

@@ -44,4 +44,16 @@ SU41/src/su/include/offsets.h
 
 and others.
 
+--------
+
+Seismic Unix uses src/su/include/hdr.h which provides as struct associating
+data header fieldѕnames with header field type and offset. This C header file
+is generated automatically by C programs and shell scripts in src/su/include
+on the basis of the contents of src/su/include/segy.h
+
+For the current task, I recommend to simple copy and use src/su/include/hdr.h
+from the Seismic Unix installation directory, just like we use
+src/su/include/segy.h An update of hdr.h is only necessary upon a modification
+of segy.h, which can both be accomplished by a vendor drop.
+
 ----- END OF issue8_libdatrwxx_handle_full_SeismicUnix_headers.txt -----