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.

Latvian part-of-speech tagset is available in Latvian corpora annotated by the LV Tagger for Latvian developed by the Artificial Intelligence Laboratory of the University of Latvia, Institute of Mathematics and Computer science Machine learning code based on the Stanford NLP kit.  The used tagset is derived from MULTEXT-East morphological specification and it is very close to this tagset format.

An Example of a tag in the CQL concordance search box[tag="ncfsg4"] finds all common feminine singular nouns in genitive of 4th declension, e.g. pilsētas, mājas (note: please make sure that you use straight double quotation marks)

General part-of-speech tagset classification

noun n.*
verb v.*
adjective a.*
pronoun p.*
adverb r.*
adposition s.*
conjunction c.*
numeral m.*
particle q.*
interjection i.*
abbreviation y
residual x.*
punctuation z.*

Noun

P Attribute (en) Value (en) Code
0 CATEGORY Noun n
1 Type common c
proper p
_
2 Gender masculine m
feminine f
loanword? _
3 Number singular s
plural p
dual d
v
loanword? _
4 Case nominative n
genitive g
dative d
accusative a
vocative v
locative l
??? s
loanword? _
5 ??? ??? 1
2
3
4
5
6
0

Verb

P Attribute (en) Value (en) Code
0 CATEGORY Verb v
1 Type main m
auxiliary a
modal o
copula c
t
g
p
e
_
2 indicative? y
infinitive n
_
3 present p
imperfect i
future f
n
c
d
m
r
_
4 ? ? i
? d
? p
? u
0
5 Gender masculine m
feminine f
? i
? t
0
others _
6 person? ? i
? s
? p
? 1
? 2
? 3
0
others _
7 ? 1
2
3
0
others _
n
g
d
a
v
l
8 Number singular s
plural p
? a
0
others _
9 ? ? p
n
a
s
g
0
others _
10 negation yes y
n n
0
others _

Adjective

P Attribute (en) Value (en)  Code
0 CATEGORY Adjective a
1 ? ? r
? f
others _
2 Gender masculine m
feminine f
others _
3 Number singular s
plural p
others _
4 Case nominative n
genitive g
dative d
accusative a
vocative v
locative l
others _
5 not derived adjective no n
yes y
others _
6 Degree positive p
comparative c
superlative s

Pronoun

P Attribute (en) Value (en) Code
0 CATEGORY Pronoun p
1 Type personal p
demonstrative d
indefinite i
possessive s
interrogative q
relative r
reflexive x
general g
others _
2 Person first 1
second 2
third 3
0
others _
3 Gender masculine m
feminine
others
4 Number singular s
plural
others
5 Case nominative n
genitive
dative
accusative
vocative
locative
others
6 Negative no n
yes
others

Adverb

P Attribute (en) Value (en) Code
0 CATEGORY Adverb r
1 Degree positive p
comparative c
superlative s
without r
0
_
2 type time t
modal m
place p
degree q

Adposition

P Attribute (en) Value (en) Code
0 CATEGORY Adposition s
1 Type preposition p
of/for t
2 ? ? p
? s
3 Case genitive g
dative d
4 ? ? n
? y

Conjunction

P Attribute (en) Value (en) Code
0 CATEGORY Conjunction c
1 Type coordinating c
subordinating s
 others _
2 Formation compound c
? d

Numeral

P Attribute (en) Value (en) Code
0 CATEGORY Numeral m
1 Type cardinal c
ordinal o
others _
2 ? ? c
? s
3 Gender masculine m
feminine f
0
others _
4 Number singular s
plural p
dual d
5 Case nominative n
genitive g
dative d
accusative a
locative l
others 0
6 quantity 1 to 9 v
11 to 19  p
dozens d
hundreds s
thousands t
millions m
billions r

Particle

P Attribute (en) Value (en) Code
0 CATEGORY Particle q
1 Type compound c
simple s
 others _

Interjection

P Attribute (en) Value (en) Code
0 CATEGORY Interjection i
1 Formation simple s
 others _

Abbreviation

P Attribute (en) Value (en) Code
0 CATEGORY Abbreviation y

Residual

P Attribute (en) Value (en) Code
0 CATEGORY Residual x
1 type URL u
numeral n
ordinal number o
other x
errors? t
foreign word f

Source: https://github.com/PeterisP/morphology/blob/master/src/main/resources/TagSet.xml (formal XML tagset notation)


Reference

P. Paikens, L. Rituma, L. Pretkalnina. Morphological analysis with limited resources: Latvian example. In Proceedings of the 19th Nordic Conference of Computational Linguistics (NODALIDA), 2013. (PDF)

Full tagset summary

Noun

P Attribute (en) Value (en) Code
0 CATEGORY Noun n
1 Type common c
proper p
_
2 Gender masculine m
feminine f
loanword? _
3 Number singular s
plural p
dual d
v
loanword? _
4 Case nominative n
genitive g
dative d
accusative a
vocative v
locative l
??? s
loanword? _
5 ??? ??? 1
2
3
4
5
6
0

Verb

P Attribute (en) Value (en) Code
0 CATEGORY Verb v
1 Type main m
auxiliary a
modal o
copula c
t
g
p
e
_
2 indicative? y
infinitive n
_
3 present p
imperfect i
future f
n
c
d
m
r
_
4 ? ? i
? d
? p
? u
0
5 Gender masculine m
feminine f
? i
? t
0
others _
6 person? ? i
? s
? p
? 1
? 2
? 3
0
others _
7 ? 1
2
3
0
others _
n
g
d
a
v
l
8 Number singular s
plural p
? a
0
others _
9 ? ? p
n
a
s
g
0
others _
10 negation yes y
n n
0
others _

Adjective

P Attribute (en) Value (en)  Code
0 CATEGORY Adjective a
1 ? ? r
? f
others _
2 Gender masculine m
feminine f
others _
3 Number singular s
plural p
others _
4 Case nominative n
genitive g
dative d
accusative a
vocative v
locative l
others _
5 not derived adjective no n
yes y
others _
6 Degree positive p
comparative c
superlative s

Pronoun

P Attribute (en) Value (en) Code
0 CATEGORY Pronoun p
1 Type personal p
demonstrative d
indefinite i
possessive s
interrogative q
relative r
reflexive x
general g
others _
2 Person first 1
second 2
third 3
0
others _
3 Gender masculine m
feminine
others
4 Number singular s
plural
others
5 Case nominative n
genitive
dative
accusative
vocative
locative
others
6 Negative no n
yes
others

Adverb

P Attribute (en) Value (en) Code
0 CATEGORY Adverb r
1 Degree positive p
comparative c
superlative s
without r
0
_
2 type time t
modal m
place p
degree q

Adposition

P Attribute (en) Value (en) Code
0 CATEGORY Adposition s
1 Type preposition p
of/for t
2 ? ? p
? s
3 Case genitive g
dative d
4 ? ? n
? y

Conjunction

P Attribute (en) Value (en) Code
0 CATEGORY Conjunction c
1 Type coordinating c
subordinating s
 others _
2 Formation compound c
? d

Numeral

P Attribute (en) Value (en) Code
0 CATEGORY Numeral m
1 Type cardinal c
ordinal o
others _
2 ? ? c
? s
3 Gender masculine m
feminine f
0
others _
4 Number singular s
plural p
dual d
5 Case nominative n
genitive g
dative d
accusative a
locative l
others 0
6 quantity 1 to 9 v
11 to 19  p
dozens d
hundreds s
thousands t
millions m
billions r

Particle

P Attribute (en) Value (en) Code
0 CATEGORY Particle q
1 Type compound c
simple s
 others _

Interjection

P Attribute (en) Value (en) Code
0 CATEGORY Interjection i
1 Formation simple s
 others _

Abbreviation

P Attribute (en) Value (en) Code
0 CATEGORY Interjection i
1 Formation simple s
 others _

Residual

P Attribute (en) Value (en) Code
0 CATEGORY Residual x
1 type url address u
numeral n
ordinal number o
symbol x
errors? t
foreign word f

Next information: http://nl.ijs.si/ME/Vault/V3/msd/html/