# What's New in DEF 5.8 C/C++ Programming Interface -- About This Manual
Describes new, changed, and removed features for the DEF API in version 5.8.
Author: Technical Publications

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What's New in DEF 5.8 C/C++ Programming Interface

# About This Manual

This document provides information on new and changed features for version 5.8 of the C and C++ application programming interface (API) used to read and write Cadence® Design Exchange Format (DEF) files.

## How This Document Is Organized

This What's New document is organized into the following chapters:

| New Features

> This chapter describes features that were added since version 5.7 of the DEF API. New features are those that introduce new functionality into the DEF API. Any enhancements made to existing statements to support a new feature are also described in this chapter.

| Changed Features

> This chapter discusses features that were changed since version 5.7 of the DEF API. Changed features include such things as changes in default behavior, changes in whether keywords and statements are required, and any other changes that do not reflect new functionality.

## Related Documents

The following documents provide detailed information about LEF and DEF, and the LEF and DEF application programming interfaces.

| DEF C/C++ Programming Interface (Open Licensing Program)

| LEF C/C++ Programming Interface (Open Licensing Program)

| LEF/DEF Language Reference

| What's New in LEF C/C++ Programming Interface

| What's New in LEF/DEF

1/20/17

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