@param props xml:output properties
@param input URI of input document
@param channel on which write final output
+ @return a triple: 1st element is a function that takes an out_channel and
+ write the result document on it, 2nd element is a string option representing
+ the desired media-type, 3rd is a string option representing the desired
+ encoding
*)
val apply:
logger: Uwobo_logger.sysLogger ->
params: (string -> (string * string) list) ->
props: (string * string) list ->
input: Gdome.document ->
- Gdome.document
+ (out_channel -> unit) * string option * string option