class TDSet: public TNamed

 Returns next TDSetElement.

 Default ctor.

 Create a named TDSet object. The "type" defines the class of which objects
 will be processed (default 'TTree'). The optional "objname" argument
 specifies the name of the objects of the specified class.
 If the "objname" is not given the behaviour depends on the 'type':
 for 'TTree' the first TTree is analyzed; for other types, all objects of
 the class found in the specified directory are processed.
 The "dir" argument specifies in which directory the objects are
 to be found, the top level directory ("/") is the default.
 Directories can be specified using wildcards, e.g. "*" or "/*"
 means to look in all top level directories, "/dir/*" in all
 directories under "/dir", and "/*/*" to look in all directories
 two levels deep.
 For backward compatibility the type can also be passed via 'name',
 in which case 'type' is ignored.

 Create a named TDSet object from existing TChain 'chain'.
 If 'withfriends' is kTRUE add also friends.
 This constructor substituted the static methods TChain::MakeTDSet
 removing any residual dependence of 'tree' on 'proof'.

 Cleanup.

 Process TDSet on currently active PROOF session.
 The return value is -1 in case of error and TSelector::GetStatus() in
 in case of success.

 Add objects that might be needed during the processing of
 the selector (see Process()).

 Clear input object list.

 Get specified object that has been produced during the processing
 (see Process()).

 Get list with all object created during processing (see Process()).

 Print TDSet basic or full data. When option="a" print full data.

 Set/change object name.

 Set/change directory.

 Add file to list of files to be analyzed. Optionally with the
 objname and dir arguments the default, TDSet wide, objname and
 dir can be overridden.

 Add specified data set to the this set.

 Add files passed as list of TFileInfo, TUrl or TObjString objects .
 If TFileInfo, the first entry and the number of entries are also filled.

 Export TDSetElements files as list of TFileInfo objects in file
 'fpath'. If the file exists already the action fails, unless
 'opt == "F"'.
 Return 0 on success, -1 otherwise

 Add friend dataset to this set. Only possible if the TDSet type is
 a TTree or derived class. The friendset will be owned by this class
 and deleted in its destructor.

 Reset or initialize access to the elements.

 Returns number of entries in tree or objects in file. Returns -1 in
 case of error.

 Draw expression varexp for specified entries.
 Returns -1 in case of error or number of selected events in case of success.
 This function accepts a TCut objects as argument.
 Use the operator+ to concatenate cuts.
 Example:
   dset.Draw("x",cut1+cut2+cut3);

 Draw expression varexp for specified entries.
 Returns -1 in case of error or number of selected events in case of success.
 For more see TTree::Draw().

 Start the TTreeViewer on this TTree.

 Returns a tree header containing the branches' structure of the dataset.

 Check if all elemnts are valid.

 Remove TDSetElement 'elem' from the list.
 Return 0 on success, -1 if the element is not in the list

 Validate the TDSet by opening files.

 Resolve the end-point URL for the current elements of this data set

 Flag all the elements as looked-up, so to avoid opening the files
 if the functionality is not supported

 Validate the TDSet against another TDSet.
 Only validates elements in common from input TDSet.

 Stream an object of class TDSet.

 Set/Reset the 'OldStreamer' bit in this instance and its elements.
 Needed for backward compatibility in talking to old client / masters.