@ -- When a hyperlink occurs from one artifact to another (for example
@ -- when a check-in comment refers to a ticket) an entry is made in
@ -- the following table for that hyperlink.  This table is used to
@ -- facilitate the display of "back links".
@ --
@ CREATE TABLE backlink(
@   target TEXT,           -- Where the hyperlink points to
@   srctype INT,           -- 0=comment 1=ticket 2=wiki. See BKLNK_* below.
@   srcid INT,             -- EVENT.OBJID for the source document
@   mtime TIMESTAMP,       -- time that the hyperlink was added. Julian day.
@   UNIQUE(target, srctype, srcid)
@ );
@ CREATE INDEX backlink_src ON backlink(srcid, srctype);
@
@ -- Each attachment is an entry in the following table.  Only

@   childid INT,
@   isExclude BOOLEAN DEFAULT false,
@   PRIMARY KEY(parentid, childid)
@ ) WITHOUT ROWID;
@ CREATE INDEX cherrypick_cid ON cherrypick(childid);
;

/*
** Backlink source types
*/
#if INTERFACE
# define BKLNK_COMMENT    0   /* Check-in comment */
# define BKLNK_TICKET     1   /* Ticket body or title */
# define BKLNK_WIKI       2   /* Wiki, Technote, or Forum body */
#endif

/*
** Predefined tagid values
*/
#if INTERFACE
# define TAG_BGCOLOR    1     /* Set the background color for display */
# define TAG_COMMENT    2     /* The check-in comment */
# define TAG_USER       3     /* User who made a checking */