Two kinds of grammateme values are distinguished: the basic and special ones.
Basic values. Every grammateme has at least two basic values.
For example, sg and pl are basic values for the number grammateme.
The basic values of individual grammatemes are listed in Section 5, "Grammatemes".
Special values. Apart from the basic values, there are three special values. These are:
nr
All grammatemes may be assigned the nr value. The value nr is assigned when it is not possible to exclude any of the basic values (i.e. all basic values are possible in the given case).
An example of such a situation (the number grammateme cannot be specified):
Vypral si kalhoty. [number=nr] (=He washed his pants)
In case it is possible to exclude at least one of the basic values, all the other values are listed.
Consider the gender grammateme in:
Viděl jen dva. [gender=inan|anim] (=He only saw two.m.anim/inanim)
nil
The nil value only occurs with certain verbal grammatemes (see Section 5.9, "The verbmod grammateme (verbal modality)" through Section 5.15, "The iterativeness grammateme") - namely in case none of the basic values is suitable.
For example: the tense grammateme for imperatives.
inher
The inher value is assigned to all grammatemes of (coreferring) nodes for the reflexives (se / se, svůj (=self, self's)) or relative pronouns (Ti, kdo přišli...Muži, kteří přišli... (=Those who came, The men who came)). The inher value is assigned in those cases when the grammateme value follows from the value of the given grammateme assigned to the coreferred node (the grammateme values are inherited from the coreferred nodes in the cases of grammatical coreference; see Section 2.1, "Coreference with reflexive pronouns" and Section 2.2, "Coreference with relative elements").
The inher value is what distinguishes the reflexives from personal and possessive pronouns (the reflexives are represented by the same t-lemma as the personal and possessive pronouns, namely #PersPron) and relative pronouns from the interrogative ones (their m-lemmas are usually identical; the relatives are moreover differentiated from the interrogatives by means of different values of their indeftype grammateme - see Section 5.6, "The indeftype grammateme").
For example, while svůj (=self's) is represented by the #PersPron t-lemma and its grammatemes have the inher value, můj has the same t-lemma but its grammatemes are assigned the basic values; kdo (=who) in the sentence Ti, kdo přišli... (=Those who came...) is represented by the t-lemma kdo and the grammatemes have the inher value, while the interrogative kdo in the sentence Kdo přišel? (=Who came?) is represented by the same t-lemma kdo, but its grammatemes are assigned the basic values.