class lookup_public_id_as_string :Makes a resolver for?fixenc:Pxp_core_types.I.encoding -> (string * string) list ->resolver
PUBLIC identifiers. The catalog argument specifies
 pairs (pubid, text) mapping PUBLIC identifiers to XML text (which must
 begin with <?xml ...?>).
 The same restriction as for lookup_public_id_as_file applies.
 fixenc: Overrides the encoding of the strings.
