create new presi 4 branch

Author: kirschbombe

source/presentation/4.0/change-log.md

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+---
+title: "Presentation API 4.0 Change Log"
+title_override: "Changes for IIIF Presentation API Version 4.0"
+id: presentation-api-40-change-log
+layout: spec
+cssversion: 3
+tags: [specifications, presentation-api, change-log]
+major: 4
+minor: 0
+patch: 0
+pre: final
+redirect_from:
+ - /presentation/4.0/change-log-40.html
+---
+
+This document is a companion to the [IIIF Presentation API Specification, Version 4.0][prezi40]. It describes the changes to the API specification made in this major release, including ones that are backwards incompatible with [version 3.0][prezi30], the previous version.
+
+
+## 1. Breaking Changes
+
+### 1.1. External Specifications
+
+
+
+### 1.2. Property Naming and Semantics Changes
+
+
+
+### 1.3. Property Value Changes
+
+
+
+### 1.4. Classes Changes
+
+
+
+### 1.5. Requirements Changes
+
+
+## 2. Non-Breaking Changes
+
+### 2.1. Enable 3D Content
+
+
+
+
+### 2.2. Additional Features
+
+
+
+### 2.3. Protocol Features
+
+
+
+
+## 3. Editorial Changes
+
+### 3.1. Clarifications
+
+
+
+
+### 3.2. Style
+
+
+
+
+[prezi40-changelog-long-texts]: #long-texts
+
+{% include acronyms.md %}
+{% include links.md %}