next up previous contents index
Next: STRUCT record Up: CGX Data Records Previous: CGX Data Records   Contents   Index

LIBRARY record

The LIBRARY record should be the first data record in the file, and can appear once only.

The flags byte of the record header can be used for a version number, which identifies in some way the remaining data in the file.

The LIBRARY record contains the following fields:

bytes field name purpose
8 munit machine units
8 uunit user units
8 cdate library creation date
8 mdate library modification date
? libname library name string

The first two fields are double-precision numbers that define the scale factors for the data in the file. These are interpreted in the same way as the similar fields in the header of a GDSII file.

The second two fields represent creation and modification dates for the file content.

A name string for the library follows. Strings are null-byte terminated, and an additional null byte is added if necessary so that the total length is even.


next up previous contents index
Next: STRUCT record Up: CGX Data Records Previous: CGX Data Records   Contents   Index
Stephen R. Whiteley 2017-11-08