The Vedas do not belong to any other category. However, the
Vedas themselves are divided into four parts namely the Samhitas,
the Brahmanas, the Aranyakas and the Upanishads. The first two
parts are generally focused on the rituals and they form the
Karma-kanda portion of the Vedas. The later two parts form the
Jnana-kanda (concerned with knowledge) portion of the Vedas.
This categorizaton also comes handy at the time of
differentiating between Purva and Uttara MImamsa. Purva-Mimamsa is
based on the earlier (Purva = earlier) parts of the Vedas i.e.
Samhitas and Brahmanas. Uttar-Mimamsa is based on the later (Uttar
= later) parts of the Vedas i.e. Aranyakas and the Upanishads.