Attributes
v_true n
is v n ""
, the boolean attribute n
set to true (the attribute must be omitted to be false).
add_if c att atts
is att :: atts
if c
is true
and atts
otherwise.
add_some n o atts
is (v n value) :: atts
if o
is Some value
and atts
otherwise.
Predefined attribute constructors
type 'a cons = 'a -> t
The type for attribute constructors with value of type 'a
.
val placeholder : string cons