ReleaseNotes.md

     |        13|        0|dd4hep::DetElement::Object
     |         3|        0|dd4hep::SensitiveDetector::Object
     |         3|        0|dd4hep::Readout::Object
     |         1|        0|dd4hep::OverlayedField::Object
     |         1|        0|dd4hep::CartesianField::Object
     ....
     Ideally the second column only has "0"s. Instances of 1 may be OK (singletons).
```
- Prenotice:
     As soon as ROOT v 6.00 is out, we will have to use it!
     Andrei kindly agreed to implement a few changes to TGeo, which will make 
     life much easier and the implementation cleaner and less cumbersome.


# v00-01
* 2013/20/03    Markus Frank
- Finished the compact->description converter
     Extract description information
```
      $ > geoConverter -compact2description -input file:<compact-input-xml-file> -output <detector>.description
      $ > <SimDist>/scripts/slic.sh -o output.slcio -g SiD.description -m <geant4-macro>.mac -r 100 
```

- Finished the compact->gdml converter
  Full GDML cycle can be tested (deplace <detector> with some meaningful identifier):
  - Extract gdml information
      `$ > geoConverter -compact2gdml -input file:<compact-input-xml-file> -output <detector>.gdml`
  - Extract visualisation hints to csv file
      `$ > geoConverter -compact2vis -input file:<compact-input-xml-file> -output <detector>.vis.csv -ascii`
  - Load GDML into ROOT:
      `$ > root.exe ../doc/gdml_root.C+\(\"<detector>\"\)`
      The macro expects *at least* the <detector>.gdml file. If no visualisation
      information is found, the resulting graphics however is not very nice!
 

* 2013/22/02    Markus Frank
- Today a decision was taken to remove all _X() and _A() macros 
  accessing static unicode strings. A common macro will be used to
  address both XML elements and XML attributes using the macro _U(...).
  The original usage only created confusion.
  All _X and _A macros were replaced by _U.

- Improve the executables running the plugin mechanism in UtitlityApps.
  They now complain if the plugin was not found.


* 2013/21/02    Markus Frank
- Require strict checks for the existence of xml attributes.
  e.g. default=false for Element::attr<bool>() is no longer an option.
  if the attribute is not present in the element, an exception
  is thrown.

- Slightly change the factory method for creating detector elements.
  Use a more generic pattern do support also more generic XML 
  processing.

* 2013/20/02    Markus Frank
- Install rootmap mechanism for the usage of plugins.
  It is no longer necessary to have separate programs
  for the various detector models (ILD/SiD).
  One generic display program servest them all.
  ==> Creation of package DDExamples/UtilityApps
  example: $> bin/displayGeo -compact <compact-xml-file>

- This move has another consequence:
  All libraries are build into a common install area:
  the <build directory>/lib.
  All executable binaries are build into a common install area:
  the <build directory>/bin.

- The LD_LIBRARY_PATH and PATH variables as defined in 
  'thisdd4hep.(c)sh' do include these directories

* 2013/20/02    Markus Frank
- dd4hep release notes. Better start them late than never.
  If you perform significant changes to the dd4hep core,
  plase leave a small notice here.