diff --git a/README.md b/README.md
index ef64b2e3..476999cc 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,11 @@
 <div>
 <h3>Further Description of this Repository</h3>
 
-<p>Early commits for this repository begin with the source for all parts of DITA Version 1.3: http://docs.oasis-open.org/dita/dita/v1.3/os/part0-overview/dita-v1.3-os-part0-overview.html</p>
+<p>Early commits for this repository begin with the source for all parts of DITA Version 1.3: 
+http://docs.oasis-open.org/dita/dita/v1.3/os/part0-overview/dita-v1.3-os-part0-overview.html</p>
+<p>Version 1.3 source is updated with 1.3 Errata 01; both of these versions were orginally maintained in SVN:
+http://docs.oasis-open.org/dita/dita/v1.3/errata01/os/complete/part0-overview/dita-v1.3-errata01-os-part0-overview-complete.html</p>
+<p>From this point, GitHub is used for work on both DITA 2.0 and any other DITA 1.3 Errata.</p>
 </div>
 
 <div>
diff --git a/doctypes/README.md b/doctypes/README.md
new file mode 100644
index 00000000..a9bf5129
--- /dev/null
+++ b/doctypes/README.md
@@ -0,0 +1,7 @@
+# DITA 1.3 Errata 01 Grammar files
+
+This directory contains the Relax NG, DTD, and XML Schema versions of the DITA Version 1.3 grammar files. 
+These grammar files are based on DITA Version 1.3 Part 3: All-Inclusive Edition Plus Errata 01:
+http://docs.oasis-open.org/dita/dita/v1.3/errata01/os/complete/part3-all-inclusive/dita-v1.3-errata01-os-part3-all-inclusive-complete.html
+
+This directory also contains extra catalog files used to generate Base and Technical Content editions of the grammar files.
\ No newline at end of file
diff --git a/specification/README.md b/specification/README.md
new file mode 100644
index 00000000..d5b506b2
--- /dev/null
+++ b/specification/README.md
@@ -0,0 +1,46 @@
+# The OASIS DITA 1.3 Errata 01 specification is delivered in four parts. 
+
+Each part is built from DITA source, with content reused across the parts.
+DITAVAL documents are used to conditionally process each map in order to generate
+the final specification. This document describes which map and which DITAVAL
+document is used to generate the parts.
+
+## Darwin Information Typing Architecture (DITA) Part 0: Overview Plus Errata 01.
+
+Part 0 is built using the following root map: 
+`dita-1.3-specification-overview.ditamap`
+
+Part 0 is built using the following DITAVAL document: 
+`resources/DITA1.3-spec-overview.ditaval`
+
+## Darwin Information Typing Architecture (DITA) Part 1: Base Edition Plus Errata 01. 
+
+This edition contains topic and map; it is designed for implementers and users who need only the most fundamental pieces of the DITA framework.
+
+Part 1 is built using the following root map: 
+`dita-1.3-specification-base.ditamap`
+
+Part 1 is built using the following DITAVAL document: 
+`resources/DITA1.3-spec-base.ditaval`
+
+## Darwin Information Typing Architecture (DITA) Part 2: Technical Content Edition Plus Errata 01. 
+
+This edition contains the base architecture plus the technical-content specializations; it is designed for authors who use information typing and document complex applications and devices.
+
+Part 2 is built using the following root map: 
+`dita-1.3-specification-technicalContent.ditamap`
+
+Part 2 is built using the following DITAVAL document: 
+`resources/DITA1.3-spec-technicalContent.ditaval`
+
+
+## Darwin Information Typing Architecture (DITA) Part 3: All-Inclusive Edition Plus Errata 01.
+
+This edition contains the base architecture, technical content, and the learning and training specializations. It is designed for implementers who want all OASIS-approved specializations, as well as users who develop learning and training materials.
+
+Part 3 is built using the following root map: 
+`dita-1.3-specification-learningTraining.ditamap`
+
+Part 3 is built using the following DITAVAL document: 
+`resources/DITA1.3-spec-learningTraining.ditaval`
+
diff --git a/specification/resources/DITA1.3-spec-base.ditaval b/specification/resources/DITA1.3-spec-base.ditaval
new file mode 100644
index 00000000..eee998ac
--- /dev/null
+++ b/specification/resources/DITA1.3-spec-base.ditaval
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<val>
+    <!-- Values for @otherprops; used to avoid DITA-OT informational errors -->
+    <prop att="otherprops" val="containedby" action="include" />
+    <prop att="otherprops" val="contains" action="include" />
+    <prop att="otherprops" val="examples" action="include" />
+    <prop att="otherprops" val="inheritance" action="include" />
+    
+    <!-- Values used to toggle between OASIS and external publishing -->
+    <prop att="platform" val="dita-tc-publishing" action="include"/>
+    <prop att="platform" val="external-publishing-engine" action="exclude"/>
+    
+    <!-- Values used to include appropriate content for the edition -->
+    <prop att="product" val="base" action="include" />
+    <prop att="product" val="learningTraining" action="exclude" />
+    <prop att="product" val="technicalContent" action="exclude" />
+    
+    <!-- Values used to generate appropriate "About this specification" topic -->
+    <prop att="product" val="part-0" action="exclude" />
+    <prop att="product" val="part-1" action="include" />
+    <prop att="product" val="part-2" action="exclude" />
+    <prop att="product" val="part-3" action="exclude" />
+    
+    <!-- Values used to generate revision marking -->
+    <revprop action="flag" color="red" val="errata-01">
+      <startflag><alt-text>►</alt-text></startflag>
+    <endflag><alt-text>◄</alt-text></endflag>
+</revprop>
+</val>
\ No newline at end of file
diff --git a/specification/resources/DITA1.3-spec-errata.ditaval b/specification/resources/DITA1.3-spec-errata.ditaval
new file mode 100644
index 00000000..7d3216de
--- /dev/null
+++ b/specification/resources/DITA1.3-spec-errata.ditaval
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<val>
+
+<!-- Values used to toggle between OASIS and external publishing -->
+    <prop att="platform" val="dita-tc-publishing" action="include"/>
+    <prop att="platform" val="external-publishing-engine" action="exclude"/>
+
+<!-- Values used to generate appropriate "About this specification" topic -->
+    <prop att="product" val="part-0" action="exclude" />
+    <prop att="product" val="part-1" action="exclude" />
+    <prop att="product" val="part-2" action="exclude" />
+    <prop att="product" val="part-3" action="exclude" />
+ 
+  <!-- Values used to generate revision marking -->
+  <revprop action="flag" color="red" val="errata-01">
+    <startflag><alt-text>►</alt-text></startflag>
+    <endflag><alt-text>◄</alt-text></endflag>
+  </revprop>
+    
+</val>
diff --git a/specification/resources/DITA1.3-spec-learningTraining.ditaval b/specification/resources/DITA1.3-spec-learningTraining.ditaval
new file mode 100644
index 00000000..c1384a97
--- /dev/null
+++ b/specification/resources/DITA1.3-spec-learningTraining.ditaval
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<val>
+    <!-- Values for @otherprops; used to avoid DITA-OT informational errors -->
+    <prop att="otherprops" val="containedby" action="include" />
+    <prop att="otherprops" val="contains" action="include" />
+    <prop att="otherprops" val="examples" action="include" />
+    <prop att="otherprops" val="inheritance" action="include" />
+    
+    <!-- Values used to toggle between OASIS and external publishing -->
+    <prop att="platform" val="dita-tc-publishing" action="include"/>
+    <prop att="platform" val="external-publishing-engine" action="exclude"/>
+    
+    <!-- Values used to include appropriate content for the edition -->
+    <prop att="product" val="base" action="include" />
+    <prop att="product" val="learningTraining" action="include" />
+    <prop att="product" val="technicalContent" action="include" />
+    
+    <!-- Values used to generate appropriate "About this specification" topic -->
+    <prop att="product" val="part-0" action="exclude" />
+    <prop att="product" val="part-1" action="exclude" />
+    <prop att="product" val="part-2" action="exclude" />
+    <prop att="product" val="part-3" action="include" />
+    
+    <!-- Values used to generate revision marking -->
+  <revprop action="flag" color="red" val="errata-01">
+    <startflag><alt-text>►</alt-text></startflag>
+    <endflag><alt-text>◄</alt-text></endflag>
+</revprop>
+</val>
\ No newline at end of file
diff --git a/specification/resources/DITA1.3-spec-overview.ditaval b/specification/resources/DITA1.3-spec-overview.ditaval
new file mode 100644
index 00000000..b5700d62
--- /dev/null
+++ b/specification/resources/DITA1.3-spec-overview.ditaval
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<val>
+
+<!-- Values used to toggle between OASIS and external publishing -->
+    <prop att="platform" val="dita-tc-publishing" action="include"/>
+    <prop att="platform" val="external-publishing-engine" action="exclude"/>
+
+<!-- Values used to generate appropriate "About this specification" topic -->
+    <prop att="product" val="part-0" action="include" />
+    <prop att="product" val="part-1" action="exclude" />
+    <prop att="product" val="part-2" action="exclude" />
+    <prop att="product" val="part-3" action="exclude" />
+ 
+    <!-- Values used to generate revision marking -->
+    <revprop action="flag" color="red" val="errata-01">
+    <startflag><alt-text>►</alt-text></startflag>
+    <endflag><alt-text>◄</alt-text></endflag>
+    
+</revprop>
+    
+</val>
diff --git a/specification/resources/DITA1.3-spec-technicalContent.ditaval b/specification/resources/DITA1.3-spec-technicalContent.ditaval
new file mode 100644
index 00000000..aaa18357
--- /dev/null
+++ b/specification/resources/DITA1.3-spec-technicalContent.ditaval
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<val>
+    <!-- Values for @otherprops; used to avoid DITA-OT informational errors -->
+    <prop att="otherprops" val="containedby" action="include" />
+    <prop att="otherprops" val="contains" action="include" />
+    <prop att="otherprops" val="inheritance" action="include" />
+    <prop att="otherprops" val="examples" action="include" />
+    
+    <!-- Values used to toggle between OASIS and external publishing -->
+    <prop att="platform" val="dita-tc-publishing" action="include"/>
+    <prop att="platform" val="external-publishing-engine" action="exclude"/>
+    
+    <!-- Values used to include appropriate content for the edition -->
+    <prop att="product" val="base" action="include" />
+    <prop att="product" val="learningTraining" action="exclude" />
+    <prop att="product" val="technicalContent" action="include" />
+    
+    <!-- Values used to generate appropriate "About this specification" topic -->
+    <prop att="product" val="part-0" action="exclude" />
+    <prop att="product" val="part-1" action="exclude" />
+    <prop att="product" val="part-2" action="include" />
+    <prop att="product" val="part-3" action="exclude" />
+    
+    <!-- Values used to generate revision marking -->
+    <revprop action="flag" color="red" val="errata-01">
+    <startflag><alt-text>►</alt-text></startflag>
+    <endflag><alt-text>◄</alt-text></endflag>
+</revprop>
+</val>
\ No newline at end of file