A tagset is a list of part-of-speech tags (POS tags for short), i.e. labels used to indicate the part of speech and sometimes also other grammatical categories (case, tense, etc.) of each token in a text corpus.

Marathi part-of-speech tagset developed by IIIT Hyderabad (International Institute of Information Technology – Hyderabad)

An Example of a tag in the CQL concordance search box[tag="NN.*|NST"] finds all nouns, e.g. चांगुलपणा  (note: please make sure that you use straight double quotation marks)

Tagset

PoS Tag Description Note/Example
NN Common Nouns चांगुलपणा, मंडळी
NST Noun Denoting Spatial and Temporal Expressions मागे, पुढे, अगोदर
NNP Proper Nouns (name of person) मोहन, राम, गझलेमधील
PRP Pronoun मी, आपण, माझा
DEM Demonstrative तो, ती, हा, 
VM Verb Main (Finite or Non-Finite) बसणे, केली
VAUX Verb Auxiliary नये, लागली
JJ Adjective (Modifier of Noun) प्रभावी, तसा
RB Adverb (Modifier of Verb) आता, आज, देखील
PSP Postposition
पर्यंतची, चा, पासून
RP Particle
असेपर्यंत, म्हणजे
QTF Quantifiers
अनेकदा, प्रत्येक, अन्य
QTC Cardinals  एक, एकच, एकाच
QTO Ordinals दुसर्, दुसऱ्या, प्रथम
CC Conjuncts (Coordinating and Subordinating)
DMQ (WQ) Question Word कोणत्या, कुठल्याच, किती
INTF  Intensifier
अतिशय, सर्वस्वी
INJ Interjection अणू, हां
NEG Negative न, ना
XC Compounds
RDP Reduplication सुध्दा, पासूनच
UNK Unknown फारच
SYM Symbol >>, +,= 

Source: http://ltrc.iiit.ac.in/tr031/posguidelines.pdf