Example Datomic schema

gistfile1.clj

[;; user-schema.edn
  {:db/id #db/id[:db.part/db]
   :db/ident :user/fid
   :db/unique :db.unique/value
   :db/valueType :db.type/string
   :db/index true
   :db/cardinality :db.cardinality/one
   :db/doc "Unique Foursquare id for User"
   :db.install/_attribute :db.part/db}

  {:db/id #db/id[:db.part/db]
   :db/ident :user/fullname
   :db/valueType :db.type/string
   :db/cardinality :db.cardinality/one
   :db/doc "User fullname"
   :db/fulltext true
   :db.install/_attribute :db.part/db}

  {:db/id #db/id[:db.part/db]
   :db/ident :user/gender
   :db/valueType :db.type/string
   :db/cardinality :db.cardinality/one
   :db/doc "user's gender, formatted as foursquare api has"
   :db.install/_attribute :db.part/db}

  {:db/id #db/id[:db.part/db]
   :db/ident :user/homecity
   :db/valueType :db.type/string
   :db/cardinality :db.cardinality/one
   :db/doc "user's homecity"
   :db.install/_attribute :db.part/db}

  {:db/id #db/id[:db.part/db]
   :db/ident :user/bio
   :db/valueType :db.type/string
   :db/cardinality :db.cardinality/one
   :db/doc "short biography"
   :db.install/_attribute :db.part/db}

  {:db/id #db/id[:db.part/db]
   :db/ident :user/type
   :db/valueType :db.type/ref
   :db/cardinality :db.cardinality/one
   :db/doc "type of user on foursquare"
   :db.install/_attribute :db.part/db}

  ;; user/type enum values
  [:db/add #db/id[:db.part/user] :db/ident :user.type/user]

  ;; ref to contacts
  {:db/id #db/id[:db.part/db]
   :db/ident :user/contact
   :db/valueType :db.type/ref
   :db/cardinality :db.cardinality/many
   :db/isComponent true
   :db/doc "user contacts entities"
   :db.install/_attribute :db.part/db}
]

gistfile2.clj

[;; contact-schema.edn
  {:db/id #db/id[:db.part/db]
   :db/ident :contact/phone
   :db/valueType :db.type/string
   :db/cardinality :db.cardinality/one
   :db/doc "phone number for user or venue"
   :db.install/_attribute :db.part/db}

  {:db/id #db/id[:db.part/db]
   :db/ident :contact/email
   :db/index true
   :db/valueType :db.type/string
   :db/cardinality :db.cardinality/one
   :db/doc "email address"
   :db.install/_attribute :db.part/db}

  {:db/id #db/id[:db.part/db]
   :db/ident :contact/facebook
   :db/valueType :db.type/string
   :db/index true
   :db/cardinality :db.cardinality/one
   :db/doc "Facebook id for user or venue"
   :db.install/_attribut :db.part/db}
]