A field that handles data stored in external files, i.e. "Blob - binary
    large object".
    
    (gui '(+BlobField) '(txt : home obj) 72 20)
    
    
    The code above creates a textarea, size 72 x 20, and stores the text entered
    there in an external file. A corresponding, global variable, is created in
    main.l:
    
    (setq
       *Pool "db/wiki/"
       *Blob "db/wiki/blob/"
       *Jnl (and (info "fifo/wiki") "fifo/wiki")
       *Salt (16 . "$6$@1$")
       *Css '("@lib.css" "wiki/lib.css")
       *WikiCss "wiki/wiki.css"
       *WikiPort 5000 )
    
    
    Here, *Blob holds a path to the place where content from
    +BlobField will be stored. See also +/R, +TextField.