 	doc_height integer,
 
 	-- Currency
-	tr_currency varchar(16) encode text255,
-	tr_total_base dec(18, 2),
-	tr_tax_base dec(18, 2),
-	tr_shipping_base dec(18, 2),
-	ti_currency varchar(16) encode text255,
-	ti_price_base dec(18, 2),
-	base_currency varchar(16) encode text255,
+	tr_currency varchar(16) encode text255,            -- Added in 0.5.0
+	tr_total_base dec(18, 2),                          -- Added in 0.5.0
+	tr_tax_base dec(18, 2),                            -- Added in 0.5.0
+	tr_shipping_base dec(18, 2),                       -- Added in 0.5.0
+	ti_currency varchar(16) encode text255,            -- Added in 0.5.0
+	ti_price_base dec(18, 2),                          -- Added in 0.5.0
+	base_currency varchar(16) encode text255,          -- Added in 0.5.0
 
 	-- Geolocation
-	geo_timezone varchar(64) encode text255,
+	geo_timezone varchar(64) encode text255,           -- Added in 0.5.0
 
 	-- Click ID
-	mkt_clickid varchar(64) encode raw,
-	mkt_network varchar(64) encode text255,
+	mkt_clickid varchar(64) encode raw,                -- Added in 0.5.0
+	mkt_network varchar(64) encode text255,            -- Added in 0.5.0
 
 	-- ETL tags
-	etl_tags varchar(500) encode raw,
+	etl_tags varchar(500) encode raw,                  -- Added in 0.5.0
 
 	-- Derived contexts
-	derived_contexts varchar(10000) encode raw,
+	derived_contexts varchar(10000) encode raw,        -- Added in 0.5.0
 
 	CONSTRAINT event_id_040_pk PRIMARY KEY(event_id)
 )

	app_id varchar(255) encode text255,
	platform varchar(255) encode text255,
	-- Date/time
	etl_tstamp timestamp,                              -- Added in 0.4.0
	collector_tstamp timestamp not null,
	dvce_tstamp timestamp,
	-- Event
	event varchar(128) encode text255,
	                                                   -- Removed event_vendor in 0.4.0
	event_id char(36) not null unique,
	txn_id int,
	-- Namespacing and versioning

-- "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the Apache License Version 2.0 for the specific language governing permissions and limitations there under.
--
-- Version:     0.5.0
-- URL:         -
--
-- Authors:     Yali Sassoon, Alex Dean, Peter van Wesep
