vc::fossil::import::cvs::pass define \
    CollectRev \
    {Collect revisions and symbols} \
    ::vc::fossil::import::cvs::pass::collrev

# # ## ### ##### ######## ############# #####################
## 

snit::type ::vc::fossil::import::cvs::pass::collrev {
    # # ## ### ##### ######## #############
    ## Public API

    typemethod setup {} {
	# Define names and structure of the persistent state of this

	    UNIQUE (pid, name) -- Symbols are unique within the project
	}

	state writing blocker {
	    -- For each symbol we save which other symbols are
	    -- blocking its removal (if the user asks for it).

	    sid INTEGER  NOT NULL  REFERENCES symbol, -- 
	    bid INTEGER  NOT NULL  REFERENCES symbol, -- Sprouted from sid, blocks it.
	    UNIQUE (sid, bid)
	}

	state writing parent {
	    -- For each symbol we save which other symbols can act as
	    -- a possible parent in some file, and how often.

	    sid INTEGER  NOT NULL  REFERENCES symbol, -- 
	    pid INTEGER  NOT NULL  REFERENCES symbol, -- Possible parent of sid
	    n   INTEGER  NOT NULL,                    -- How often pid can act as parent.
	    UNIQUE (sid, pid)
	}

	state writing symtype {
	    tid    INTEGER  NOT NULL  PRIMARY KEY,