 	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,

	ip_domain varchar(100) encode runlength,           -- Added in 0.4.0
	ip_netspeed varchar(100) encode runlength,         -- Added in 0.4.0
	-- Page
	page_url varchar(4096),
	page_title varchar(2000),
	page_referrer varchar(4096),
	-- Page URL components
	page_urlscheme varchar(16) encode text255,
	page_urlhost varchar(255) encode text255,
