diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,2 +1,5 @@
-clj-druid
-=========
+# clj-druid
+
+Clojure library for [Druid](http://druid.io/).
+
+Currently in very early stage, contains schemas to validate a Druid query.
diff --git a/doc/intro.md b/doc/intro.md
new file mode 100644
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+++ b/doc/intro.md
@@ -0,0 +1,3 @@
+# Introduction to clj-druid
+
+TODO: write [great documentation](http://jacobian.org/writing/what-to-write/)
diff --git a/project.clj b/project.clj
new file mode 100644
index 0000000..3a9f0cd
--- /dev/null
+++ b/project.clj
@@ -0,0 +1,7 @@
+(defproject clj-druid "0.1.0-SNAPSHOT"
+  :description "Clojure library for Druid.io"
+  :url "http://example.com/FIXME"
+  :license {:name "MIT"
+            :url "http://opensource.org/licenses/MIT"}
+  :dependencies [[org.clojure/clojure "1.6.0"]
+                 [prismatic/schema "0.2.6"]])
diff --git a/src/clj_druid/schemas.clj b/src/clj_druid/schemas.clj
new file mode 100644
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+++ b/src/clj_druid/schemas.clj
@@ -0,0 +1,74 @@
+(ns clj-druid.schemas
+  (:require [schema.core :as s]))
+
+(s/defschema granularity
+  "Druid Granularity option schema"
+  (s/enum :all
+          :none
+          :minute
+          :fifteen_minute
+          :thirty_minute
+          :hour
+          :day))
+
+(s/defschema limitSpec
+  "Druid limitSpec option schema"
+  {:type String :limit Long :columns [String]})
+
+(s/defschema filterSchema
+  "Druid filter field option schema"
+  {:type (s/enum :selector :regex :and :or :not)
+   (s/optional-key :dimension) String
+   (s/optional-key :value) String
+   (s/optional-key :pattern) String
+   (s/optional-key :fields) [filterSchema]
+   (s/optional-key :field) filterSchema})
+
+(s/defschema aggregationSchema
+  "Druid filter field option schema"
+  {:type (s/enum :count :longSum :doubleSum :min :max)
+   :name String
+   (s/optional-key :fieldName) String})
+
+(s/defschema postAggregationSchema
+  "Druid filter field option schema"
+  {:type (s/enum :arithmetic :fieldAccess :constant)
+   :name String
+   (s/optional-key :fieldName) String
+   (s/optional-key :value) String})
+
+(s/defschema intervalSchema
+  "Druid interval schema"
+  [String])
+
+(s/defschema havingSchema
+  {:type (s/enum :equalTo
+                 :greaterThan
+                 :lessThan
+                 :and
+                 :or
+                 :not)
+
+   (s/optional-key :aggregation) String
+   (s/optional-key :value) String
+   (s/optional-key :havingSpecs) [havingSchema]})
+
+
+(s/defschema druidQuery
+  "Main  druid query schema"
+  {:queryType (s/enum :groupBy
+                      :search
+                      :segmentMetadata
+                      :timeBoundary
+                      :timeseries
+                      :topN)
+
+  :dataSource String
+  :dimensions [String]
+  :limitSpec limitSpec
+  :having havingSchema
+  :granularity granularity
+  :filter filterSchema
+  :aggregations aggregationSchema
+  :postAggregations postAggregationSchema
+  :intervals intervalSchema})
diff --git a/test/clj_druid/core_test.clj b/test/clj_druid/core_test.clj
new file mode 100644
index 0000000..96f1efc
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+++ b/test/clj_druid/core_test.clj
@@ -0,0 +1,7 @@
+(ns clj-druid.core-test
+  (:require [clojure.test :refer :all]
+            [clj-druid.core :refer :all]))
+
+(deftest a-test
+  (testing "FIXME, I fail."
+    (is (= 0 1))))