 	doc_charset varchar(128) encode text255,
 	doc_width integer,
 	doc_height integer,
-	CONSTRAINT event_id_040_pk PRIMARY KEY(event_id)   -- Made constraint version-specific in 0.3.0
+	CONSTRAINT event_id_040_pk PRIMARY KEY(event_id)
 )
 DISTSTYLE KEY
-DISTKEY (event_id)                                     -- Changed from domain_userid in 0.3.0
+DISTKEY (event_id)
 SORTKEY (collector_tstamp);

	mkt_content varchar(500) encode raw,
	mkt_campaign varchar(255) encode text32k,
	-- Custom contexts
	contexts varchar(10000) encode raw,                -- Added in 0.3.0
	-- Custom structured event
	se_category varchar(255) encode text255,
	se_action varchar(255) encode text255,

	-- 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
	name_tracker varchar(128) encode text255,
	v_tracker varchar(100) encode text255,
	v_collector varchar(100) encode text255 not null,
	v_etl varchar(100) encode text255 not null,
