# Table of Contents
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

# Contents

## About This Manual

How This Document Is Organized

Related Documents

## 1

## New Features

General Reader Changes

Reader Setup and Control Routines

Writer Routines - Blockages

Reader Class Routines

DEF Reader Callback Routines

## 2

## Changed Features

Reader Class Routines

  defiBlockage
  defiComponent
  defiFill
  defiNet
  defiPath
  defiPinPort
  defiPin
  defiTrack
  defiVia
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