--- /dev/null
+
+CREATE TABLE change_tag (
+ ct_rc_id INTEGER NULL,
+ ct_log_id INTEGER NULL,
+ ct_rev_id INTEGER NULL,
+ ct_tag TEXT NOT NULL,
+ ct_params TEXT NULL
+);
+CREATE UNIQUE INDEX change_tag_rc_tag ON change_tag(ct_rc_id,ct_tag);
+CREATE UNIQUE INDEX change_tag_log_tag ON change_tag(ct_log_id,ct_tag);
+CREATE UNIQUE INDEX change_tag_rev_tag ON change_tag(ct_rev_id,ct_tag);
+CREATE INDEX change_tag_tag_id ON change_tag(ct_tag,ct_rc_id,ct_rev_id,ct_log_id);
+
+
+CREATE TABLE tag_summary (
+ ts_rc_id INTEGER NULL,
+ ts_log_id INTEGER NULL,
+ ts_rev_id INTEGER NULL,
+ ts_tags TEXT NOT NULL
+);
+CREATE UNIQUE INDEX tag_summary_rc_id ON tag_summary(ts_rc_id);
+CREATE UNIQUE INDEX tag_summary_log_id ON tag_summary(ts_log_id);
+CREATE UNIQUE INDEX tag_summary_rev_id ON tag_summary(ts_rev_id);
+
+
+CREATE TABLE valid_tag (
+ vt_tag TEXT NOT NULL PRIMARY KEY
+);