20,210 canonical mantras, held as four editions rather than as one flattened corpus. Each keeps its own hierarchy and its own words for it, and each says which recension is open in front of you.
The oldest of the four and the source most of the others draw on: ten mandalas of hymns to Agni, Indra, Soma and the rest, with the traditional index naming a seer, a deity and a metre for every verse.
Mandala → Sukta → Mantra
The Rigveda arranged for singing: the ārcika verse collection in the Kauthuma recension, most of it Rigvedic wording set in a new order, carrying the svara marks that record how it was pitched. The gāna song-books it was sung from are not included.
Ārcika → Prapāṭhaka → Ardha → Daśati → Verse
The liturgy itself: forty adhyayas of formulas spoken at the rite, many of them prose, arranged by the order of the ceremony rather than by hymn.
Adhyaya → Mantra
The domestic and the urgent — healing, protection, rivalry, marriage, statecraft — in twenty kandas, and the collection that shows most of Vedic life outside the sacrificial ground.
Kanda → Sukta → Mantra
A solid mark is the edition this build holds. A hollow one is a corpus the registry records as named and outside it, so an absence measured in this product is an absence from the held recension only.
How translation, recitation and notation coverage are typed is set out in full on the scope page.