diff --git a/doctypes/dtd/catalog.xml b/doctypes/dtd/catalog.xml
index 1eb4a599..dbcdb2ff 100644
--- a/doctypes/dtd/catalog.xml
+++ b/doctypes/dtd/catalog.xml
@@ -1,6 +1,5 @@
-
diff --git a/doctypes/dtd/classificationMap/catalog.xml b/doctypes/dtd/classificationMap/catalog.xml
deleted file mode 100644
index ec1a6b73..00000000
--- a/doctypes/dtd/classificationMap/catalog.xml
+++ /dev/null
@@ -1,8 +0,0 @@
-
-
-
-
-
-
diff --git a/doctypes/dtd/classificationMap/classifyMap.dtd b/doctypes/dtd/classificationMap/classifyMap.dtd
deleted file mode 100644
index eef76c30..00000000
--- a/doctypes/dtd/classificationMap/classifyMap.dtd
+++ /dev/null
@@ -1,349 +0,0 @@
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-%mapgroup-d-dec;
-
-%alternativetitles-d-dec;
-
-%classify-d-dec;
-
-%abbrev-d-dec;
-
-%ditavalref-d-dec;
-
-%emphasis-d-dec;
-
-%glossref-d-dec;
-
-%hazard-d-dec;
-
-%hi-d-dec;
-
-%markup-d-dec;
-
-%pr-d-dec;
-
-%relmgmt-d-dec;
-
-%sw-d-dec;
-
-%syntaxdiagram-d-dec;
-
-%ui-d-dec;
-
-%ut-d-dec;
-
-%xml-d-dec;
-
-
-
-
-
-%audienceAtt-d-dec;
-
-%deliveryTargetAtt-d-dec;
-
-%platformAtt-d-dec;
-
-%productAtt-d-dec;
-
-%otherpropsAtt-d-dec;
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-%map-type;
-
-
-
-
-
-%mapgroup-d-def;
-
-%classify-d-def;
-
-%abbrev-d-def;
-
-%alternativetitles-d-def;
-
-%ditavalref-d-def;
-
-%emphasis-d-def;
-
-%glossref-d-def;
-
-%hazard-d-def;
-
-%hi-d-def;
-
-%markup-d-def;
-
-%pr-d-def;
-
-%relmgmt-d-def;
-
-%sw-d-def;
-
-
-%syntaxdiagram-d-def;
-
-%ui-d-def;
-
-%ut-d-def;
-
-%xml-d-def;
-
-
\ No newline at end of file
diff --git a/doctypes/rng/catalog.xml b/doctypes/rng/catalog.xml
index 1eb4a599..dbcdb2ff 100644
--- a/doctypes/rng/catalog.xml
+++ b/doctypes/rng/catalog.xml
@@ -1,6 +1,5 @@
-
diff --git a/doctypes/rng/classificationMap/catalog.xml b/doctypes/rng/classificationMap/catalog.xml
deleted file mode 100644
index ecf4e731..00000000
--- a/doctypes/rng/classificationMap/catalog.xml
+++ /dev/null
@@ -1,16 +0,0 @@
-
-
-
-
-
-
-
-
-
-
-
-
diff --git a/doctypes/rng/classificationMap/classifyMap.rng b/doctypes/rng/classificationMap/classifyMap.rng
deleted file mode 100644
index cc71a74f..00000000
--- a/doctypes/rng/classificationMap/classifyMap.rng
+++ /dev/null
@@ -1,127 +0,0 @@
-
-
-
-
-
- DITA Classification Map Shell
-
-=============================================================
- HEADER
-=============================================================
-Darwin Information Typing Architecture (DITA) Version 2.0
-[[[Draft level]]]
-[[[Release date]]]
-Copyright (c) OASIS Open 2018. All rights reserved.
-Source: [[[Source link]]]
-
-============================================================
- MODULE: DITA Classification Map
- VERSION: 2.0
- DATE: [[[Release date]]]
- PURPOSE: DTD to describe DITA Classification maps
-
-=============================================================
-
-=============================================================
- PUBLIC DOCUMENT TYPE DEFINITION
- TYPICAL INVOCATION
-
-Refer to this file by the following public identifier or an
- appropriate system identifier:
-PUBLIC "-//OASIS//DTD DITA 2.0 Classification Map//EN"
- Delivered as file "classifyMap.dtd"
-
-=============================================================
- (C) Copyright OASIS Open 2005, 2014.
- (C) Copyright IBM Corporation 2001, 2004.
- All Rights Reserved.
-
- UPDATES:
-=============================================================
-
-
-
- mapshell
- classifyMap
-
- -//OASIS//DTD DITA Classification Map//EN
- urn:oasis:tc:tc:dita:spec:classification:rng:classifyMap.rng
-
-
-
-
-
ROOT ELEMENT DECLARATION
-
-
-
-
-
-
-
DOMAINS ATTRIBUTE
-
-
-
-
-
-
-
-
-
MODULE INCLUSIONS
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
ID-DEFINING-ELEMENT OVERRIDES
-
-
-
-
-
-
-
- map
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
diff --git a/specification/introduction/about-the-dita-specification.dita b/specification/introduction/about-the-dita-specification.dita
index bd2cd0c0..ed0c5804 100644
--- a/specification/introduction/about-the-dita-specification.dita
+++ b/specification/introduction/about-the-dita-specification.dita
@@ -17,21 +17,19 @@
Editions
The DITA specification is delivered in three editions.
-
-
- Block diagram illustrating the components
- of the three editions of the DITA specification, and the subset relationships
- between the three editions. The Base Edition ('Part 1') contains the Base
- Architecture, which includes map, topic, and subject scheme. The Technical
- Content Edition ('Part 2') contains the Base Architecture plus the Technical
- Content specializations, which include concept, task, reference, book map,
- glossary, classification map, machine industry, and troubleshooting. The
- All-Inclusive Edition ('Part 3') contains the Base Architecture, the Technical
- Content specializations, and the Learning and Training specializations.
-
-
-
+
+
+ Block diagram illustrating the components of the three editions of the DITA
+ specification, and the subset relationships between the three editions. The
+ Base Edition ('Part 1') contains the Base Architecture, which includes map,
+ topic, and subject scheme. The Technical Content Edition ('Part 2') contains
+ the Base Architecture plus the Technical Content specializations, which
+ include concept, task, reference, book map, glossary, and troubleshooting.
+ The All-Inclusive Edition ('Part 3') contains the Base Architecture, the
+ Technical Content specializations, and the Learning and Training
+ specializations.
+
+