Re: A GDML file which cannot be parsed

From: Sergey Linev <S.Linev_at_gsi.de>
Date: Mon, 8 Feb 2010 09:34:25 +0100

Hi Akira,

 > 1) multiple comment lines are invalid
 > e.g.
 > <!-- comment1 -->
 > <!-- comment2 -->
 > causes
 >
 > Error in <TXMLEngine::ParseFile>: No multiple content entries 

allowed, line 7

Problem with comments handling was solved in SVN head version of ROOT.

 > 2) spaces before or after an equal sign are invalid
 > e.g.
 > <atom value= "1" />
 > causes (note: a white spaces exist before "1")
 >
 > Error in <TXMLEngine::ParseFile>: Invalid attribute value, line 9

It is limitation of ROOT xml parser, I will try to fix it soon.

 > 3) capital exponent style is invalid
 > e.g.
 > <D value="1E-25" unig="g/cm3"/>
 > causes
 >
 > Error in <TFormula::Compile>:  Bad numerical expression : "1E"
 >
 > this is a limitation of TFormula as it says.

It is limitation of TFormula class, one could fix it too.

 > 4) tessellated and triangular are invalid
 >
 > Error: Unsupported GDML Tag Used :tessellated. Please Check 

Geometry/Schema.
 > Error: Unsupported GDML Tag Used :triangular. Please Check Geometry/Schema.

This is error, produced by TGDMLParse class. One should check if syntax of your xml file conform with GDML or not.

 > Do I always have to modify GDML files by hand to workaround them?

Beside last problem, you could avoid other by manual editing of xml file.

Regards,
Sergey

Akira OKUMURA wrote:
> Hello Sergey,
>
> Thank you for you advise.
>
> I merged the two files by hand as you suggested, but I still get some
> errors. I list 4 error types. Are they all an intrinsic problems in my
> GDML or just limitations in ROOT? Do I always have to modify GDML
> files by hand to workaround them?
>
> 1) multiple comment lines are invalid
> e.g.
> <!-- comment1 -->
> <!-- comment2 -->
> causes
>
> Error in <TXMLEngine::ParseFile>: No multiple content entries allowed,
> line 7
>
> 2) spaces before or after an equal sign are invalid
> e.g.
> <atom value= "1" />
> causes (note: a white spaces exist before "1")
>
> Error in <TXMLEngine::ParseFile>: Invalid attribute value, line 9
>
> 3) capital exponent style is invalid
> e.g.
> <D value="1E-25" unig="g/cm3"/>
> causes
>
> Error in <TFormula::Compile>: Bad numerical expression : "1E"
>
> this is a limitation of TFormula as it says.
>
> 4) tessellated and triangular are invalid
>
> Error: Unsupported GDML Tag Used :tessellated. Please Check
> Geometry/Schema.
> Error: Unsupported GDML Tag Used :triangular. Please Check
> Geometry/Schema.
>
> Regards,
>
> OKUMURA, Akira oxon_at_juno.phys.s.u-tokyo.ac.jp
> Department of Physics, The University of Tokyo
> 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033
> TEL/FAX +81 3-5841-4173/4059
> Skype : okumura.akira
>
> On 2010/02/08, at 16:31, Sergey Linev wrote:
>
>> Dear Akira,
>>
>> Unfortunately, xml syntax you have does not supported by ROOT xml
>> parser.
>> More precisely, this one:
>>
>> ...
>> <!DOCTYPE gdml [
>> <!ENTITY materials SYSTEM "MT3_materials.xml">
>> ]>
>> ...
>>
>> and than reference like this:
>>
>> ...
>> <!-- Materials definition CallBack -->
>> &materials;
>> ...
>>
>> You should merge these files together to be able use them in ROOT.
>>
>> Regards,
>> Sergey Linev
>>
>>
>> --
>> Sergey Linev Mail: S.Linev_at_gsi.de
>> GSI, Experiment Elektronik Phone: +49-6159-71-1338
>> Planckstr. 1 FAX: +49-6159-71-2986
>> D-64291 Darmstadt
>>
>> GSI Helmholtzzentrum für Schwerionenforschung GmbH
>> Handelsregister: Amtsgericht Darmstadt, HRB 1528
>> Geschäftsführer: Prof. Dr. Horst Stoecker; Christiane Neumann
>> Vorsitzende des Aufsichtsrates: Dr. Beatrix Vierkorn-Rudolph
>>
>>
>>
>> Akira OKUMURA wrote:
>>> Hello ROOTers,
>>>
>>> I created a GDML file using the trial version of FASTRAD which can
>>> convert CAD STEP files to GDML files.
>>> http://www.fastrad.net/
>>>
>>> The attached files are those created by FASTRAD. But I cannot open
>>> MT3.gdml from TGeoManager.
>>>
>>> $ root
>>> root [0] TGeoManager::Import("MT3.gdml")
>>> Info in <TGeoManager::Import>: Reading geometry from file: MT3.gdml
>>> Error in <TXMLEngine::ParseFile>: XML syntax error at line 3
>>> Error in <TGeoManager::Import>: Cannot open file
>>> (class TGeoManager*)0x0
>>>
>>> MT3.gdml includes an external XML file, MT3_materials.xml, which is
>>> also attached. I suppose this inclusion is the reason of this parser
>>> error.
>>>
>>> Is it possible to handle this kind of files in ROOT? I can open them
>>> when using Geant4.
>>>
>>> Regards,
>>>
>>> OKUMURA, Akira oxon_at_juno.phys.s.u-tokyo.ac.jp
>>> Department of Physics, The University of Tokyo
>>> 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033
>>> TEL/FAX +81 3-5841-4173/4059
>>> Skype : okumura.akira
>>>
>
Received on Mon Feb 08 2010 - 09:34:32 CET