I need some help.

[fuguijie1985]

Dear Sir or Madam:
      I am a developer.I want some tuscany SDO help.In your DataObject 
comment,I found this method:company.get("department[number=123]") . It's a good 
method.But would you tell me if I need two or more properties like 
[number=123name='Jack'],etc,what could I do? Thank you very much!