diff --git a/documentation/RELEASE_NOTES.html b/documentation/RELEASE_NOTES.html
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@@ -0,0 +1,54 @@
+<h1>Release release/3.1 IN DEVELOPMENT</h1>
+<p>The main changes since release 3.0.2 are:</p>
+<ul>
+<li>array semantics now enforce Copy On Write.</li>
+<li>String no longer defined.</li>
+<li>toString replaced by stream I/O </li>
+<li>union is new type.</li>
+<li>copy is new.</li>
+<li>monitorPlugin is new.</li>
+</ul>
+<h2>New Semantics for Arrays</h2>
+<p>PVScalarArray, PVStructureArray, and PVUnionArray all enforce COW (Copy On Write) Semantics.
+In order to limit memory usage the storage for raw data is managed via a new shared_vector facility.
+This allows multiple instances of array data to use the shared raw data.
+COW is implemented via shared_vectors of const data, i. e. data that can not be modified.</p>
+<h2>String no longer defined</h2>
+<p>This is replaced by std::string.</p>
+<h2>toString replaced by stream I/O</h2>
+<p>pvData.h and pvIntrospect no longer defines toString
+Instead they have stream support.
+pvIntrospect uses method dump and pvData uses dumpValue.
+For example:</p>
+<pre><code>  PVDoublePtr pvValue;
+  String buffer;
+  pvValue-&gt;toString(&amp;buffer);
+  cout &lt;&lt; buffer &lt;&lt; endl;
+  buffer.clear();
+  pvValue-&gt;getField()-&gt;toString(&amp;buffer);
+  cout &lt;&lt; buffer &lt;&lt; evdl;
+</code></pre>
+<p>is replaced by</p>
+<pre><code>  PVDoublePtr pvValue;
+  cout &lt;&lt; pvValue=&gt;dumpValue(cout) &lt;&lt; endl
+  cout &lt;&lt; pvValue-&gt;getField()-&gt;dump(cout) &lt;&lt; endl;
+</code></pre>
+<h2>union is a new basic type.</h2>
+<p>There are two new basic types: union_t and unionArray.</p>
+<p>A union is like a structure that has a single subfield.
+There are two flavors:</p>
+<ul>
+<li><b>varient union</b> The field can have any type.</li>
+<li><b>union</b> The field can any of specified set of types.</li>
+</ul>
+<p>The field type can be dynamically changed.</p>
+<h2>copy</h2>
+<p>This consists of createRequest and pvCopy.
+createRequest was moved from pvAccess to here.
+pvCopy is moved from pvDatabaseCPP and now depends
+only on pvData, i. e. it no longer has any knowledge of PVRecord.</p>
+<h2>monitorPlugin</h2>
+<p>This is for is for use by code that implements pvAccess monitors.
+This is prototype and is subject to debate.</p>
+<h1>Release 3.0.2</h1>
+<p>This was the starting point for RELEASE_NOTES</p>
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diff --git a/documentation/TODO.html b/documentation/TODO.html
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+<h1>TODO</h1>
+<h2>printer</h2>
+<p>pv/printer.h is not used.</p>
+<h2>doxygen</h2>
+<p>There is a lot of public code that does not have doxygen tags.</p>
+<h2>postMonitor: PVUnion, PVUnionArray, and PVStructureArray</h2>
+<p>PVUnion, PVUnionArray, and PVStructureArray all have elements
+that are treated like a top level field.
+The implementation should be changed so that it implements PostHandler.
+Thus when an element is modified it will call postPut for itself.</p>
+<h2>monitorPlugin</h2>
+<p>A debate is on-going about what semantics should be.</p>
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diff --git a/documentation/TODO.md b/documentation/TODO.md
index d5d93d8..ffc147f 100644
--- a/documentation/TODO.md
+++ b/documentation/TODO.md
@@ -26,10 +26,3 @@ monitorPlugin
 
 A debate is on-going about what semantics should be.
 
-PVFieldConstPtr etc
--------------------
-
-In addition to PVFieldPtr should PVFieldConstPtr exist.
-But this means that all methods defined in pvDataCPP must be checked.
-This is a BIG job.
-