<br>
<hr>
<a name="io"></a>
<h3>I/O</h3>
<ul>
<li>Fix the order of creation of the TStreamerInfo during the opening of a ROOT file to insure that the CollectionProxy are properly setup.</li>
<li>Fix problem: "recover warning when opening an empty file
created with TXNetFile" which was due to a bad check <tt>in TFile::Recover</tt>
(line <tt>TFile.cxx:1561</tt>) where the inheritance from <tt>TFile</tt> should be checked
instead of requiring the name to be <tt>TFile</tt>.</li>
<li>In TBranch::File, in the case of importing the data directly from
   an external TBuffer, remove 80 char limit on reading the class name</li>
<li> Re-enable support for the
   rootrc configuration <tt>Root.ZipMode</tt>.</li>
</ul>
<h4>Data Model Evolution</h4>

First step in the implemantation of the infrastructure for the new Data Model Evolution Scheme.
<br>This Data Model Evolution is brought to your courtesy of BNL/STAR/ATLAS/Fermi/Cern<br>

<h5>Current Capabilities</h5>
<ul>
   <li>  Assign values to transient data members
<li>  Rename classes
<li>  Rename data members
<li>  Change the shape of the data structures or convert one class
<li>  structure to another
<li>  Change the meaning of data members
<li>  Ability to access the TBuffer directly when needed
<li>  Ensure that the objects in collections are handled in the same
  way as the ones stored separately
<li>  Supported in object-wise, member-wise and split modes.
</ul>

<h5>Coming soon</h5>
<ul>
<li>  Make things operational also in bare ROOT mode
<li>  Ability to transform data before writing
<li>  Support for changing the class type of nested object in a split
  branch
<li>  Support for access to onfile version of nested objects from
  within the parent rule
</ul>
<h5>LinkDef rule syntax</h5>
Setting a transient member:
<pre>  #pragma read sourceClass="ACache" targetClass="ACache" source=""
  version="[1-]" target="zcalc" \
  code="{ zcalc = false; }"
</pre>
Setting a new member from 2 removed members:

<pre>  #pragma read sourceClass="ACache" targetClass="ACache"
  source="int x; int y; char c" version="[8]" target="z" \
  code="{ z = onfile.x*1000 + onfile.y*10; }"
</pre>
   Renaming a class:

<pre>   #pragma read sourceClass="ACache" version="[8]"
   targetClass="Axis" \
   source="int x; int y;" target="z" \
   code="{ z = onfile.x*1000 + onfile.y*
   #pragma read sourceClass="ACache" version="[9]"
   targetClass="Axis";</pre>

See the <a href="DataModelEvolution.txt">long form documentation</a>

<h5>Selection XML syntax</h5

<pre>   &lt;read sourceClass="ACache" targetClass="ACache" source=""
   version="[1-]" target="zcalc"&gt;
   &lt;![CDATA[
   { zcalc = false; }
   ]]&gt;&lt;/read&gt;
</pre>
<br>