\input texinfo
@setfilename node-value.info
@set a--foo bar

@node Top, @value{a--foo}, (dir), (dir)
@top Var @value{a--foo}
@value{a--foo}

@node @value{a--foo}, BarFoo, Top, (dir)
@chapter BarFoo

@node BarFoo, , @value{a--foo}, (dir)
@chapter bar

@bye