Problem 1947

Created attachment 444 [details]
Patch to be applied relative to geant4.10.03/.. (obtained by diff between two geant4.10.03 trees)

In geant4.10.3 it is not possible to specify material properties tables for optical surfaces in GDML. This restricts the users from implementing, among others, the optical surface properties REFLECTIVITY, EFFICIENCY, etc (see http://geant4.cern.ch/G4UsersDocuments/UsersGuides/ForApplicationDeveloper/html/TrackingAndPhysics/physicsProcess.html#5.2.5.4, source listings 5.2.9 and 5.2.10 for more examples).

The attached path against geant4.10.3 introduces the reading of the tags such as <property name="REFELCTIVITY" ref="REFLECTIVITY_CATHODE"/> as children of the <opticalsurface> tag.

The following GDML code is then possible:
  <opticalsurface
    name="pionDetectorLucite_LightGuideInside_to_PMT_opticalsurface"
    model="glisur" finish="polished" type="dielectric_metal" value="1.0">
    <property name="REFLECTIVITY" ref="REFLECTIVITY_CATHODE"/>
    <property name="EFFICIENCY"   ref="EFFICIENCY_CATHODE"/>
  </opticalsurface> 

To be completed:
- I don't have a background in how xml schemas are to be written, so I didn't attempt to apply the necessary changes to source/persistency/gdml/schema/gdml_solids.xsd. This patch will therefore throw validation errors. I suspect either gdml_materials.xsd should be included or the material properties table tag should be copied over from gdml_materials.xsd into gdml_solids.xsd.