Check namespaces and classes

class %XML.Namespaces Two class methods are provided , Can be used to check XML Namespace and its contained classes ：

GetNextClass()

classmethod GetNextClass(namespace As %String, 
            class As %String) as %String

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Return to a given XML The next class after a given class in the namespace ( In alphabetical order ). When there are no more classes , This method returns NULL.

GetNextNamespace()

classmethod GetNextNamespace(namespace As %String) as %String

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Returns the next namespace after the given namespace ( In alphabetical order ). When there are no more namespaces , This method returns NULL.

In both cases , Consider only current InterSystems IRIS Namespace . Besides , Mapped classes are also ignored .

for example , The following method lists the current InterSystems IRIS Namespace XML Namespace and its classes ：

ClassMethod WriteNamespacesAndClasses()
{
  Set ns=""
  Set ns=##class(%XML.Namespaces).GetNextNamespace(ns)

  While ns '=""
  {
    Write !, "The namespace ",ns, " contains these classes:"
    Set cls=""
    Set cls=##class(%XML.Namespaces).GetNextClass(ns,cls)
    
    While cls '=""
    {
      Write !, "   ",cls
      Set cls=##class(%XML.Namespaces).GetNextClass(ns,cls)
      }
      
      Set ns=##class(%XML.Namespaces).GetNextNamespace(ns)
      }
}

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When executing in the terminal , This method produces the output shown below ：

The namespace http://www.address.org contains these classes:
   ElRef.NS.Address
   GXML.AddressNS
   MyApp4.Obj.Address
   MyAppNS.AddressNS
   Obj.Attr.Address
   Obj.Ns.Address
   Obj.Ns.AddressClass
The namespace http://www.doctor.com contains these classes:
   GXML.DoctorNS
The namespace http://www.one.org contains these classes:
   GXML.AddressNSOne
   GXML.DoctorNSOne
   GXML.PersonNSOne 

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