Ethereal-dev: [Ethereal-dev] WHAT IS ROLE OF ETT field

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From: "Raman Singla" <ramans@xxxxxxxxxxxxxxxxxxx>
Date: Thu, 11 May 2006 15:29:31 +0530
Hi all,
 
Kindly tell me the role of of ett field.
 
It is usred in when we are creating the subtree from item e.g.
 
proto_item_add_subtree (subitem, ett_**);
 
Could any one please tell me the role of having an ett field here, whereas if i give any ID it also works.
 
Why we require ett_field. (Expansion & filtering still works if i don't give ett field in subtree). Can we skip ett fields & if we do what will the effects ?
 
Kindly let me know ?
 
regards,
raman