The information contained in this standard is intended to supplement the IPC-D-350 through IPC-D-353 standard series. This document describes the usage of libraries within the processing and generation of information files. The data contained within covers both the definition and usage of internal (exist within the information file) and external libraries. The libraries can be used to make the data generated more compact and thus facilitate data exchange and archival. The subroutines within a library can be used one or more times within any Data Information Module (see 5.2), and also in one or more Data Information Modules. As a supplement, this document will not cover the specifics of the other standards in the series.