A: when you search certain field Unicode word or id then it will only show result if there is any exact match.
B: when you search certain field Unicode word or id then it will show result if there is any substring match.
C-I: these are fields which can be searched separately for exact match [A] or substring match [B]
C: Search on id.
e.g. पत्थर in iitk is pawWara
E: Search Unicode word. Here you can search for Hindi words and phrases.
e.g. गाना, अमर
F: Search English word. Here you can search for English words or phrases
G: Search Restriction. This is UNL specific syntax. It gives extra information of the concept so as to make the meaning of the word clear.
H: Search for the gloss. Gloss gives the explanation about the concept in simple English words.
I: Search examples. Examples gives the usage of the concept in English language.