This document describes Datom, a database that provides: 1) A flexible, time-based store of facts that supports queries and joins. 2) Elastic scalability and ACID transactions. 3) An entity-attribute-value model to represent facts as transactions over time.

1. Database of flexible, time-based facts,
supporting queries and joins, with elastic scalability,
and ACID transactions.
Christophe Marchal

2. Rich Hickey

7. Datom
Entity/Attribute/Value/Transaction
"John likes pizza" (T42)
Entity: John
Attributes: likes
Value: pizza
T42: transaction 42

8. Schema
{:db/id #db/id[:db.part/db]
:db/ident :community/name
:db/valueType :db.type/string
:db/cardinality :db.cardinality/one
:db/fulltext true
:db/doc "A community's name"
:db.install/_attribute :db.part/db}

9. Datom
{:community/category ["members of the Alki Community Council
and residents of the Alki Beach neighborhood"],
:community/orgtype :community.orgtype/community,
:community/type :community.type/email-list,
:db/id #db/id[:db.part/user -1000009],
:community/name "Alki News",
:community/url
"http://groups.yahoo.com/group/alkibeachcommunity/",
:community/neighborhood #db/id[:db.part/user -1000008]}

10. Datalog

11. Database functions

12. Thank you!
@toff63