Contents The OpenSP package contains onsgmls, ospam, osx, ospcat and ospent. Description onsgmls onsgmls process SGML files. ospam ospam is a markup stream editor. osx osx is a SGML normalizer or a converter of SGML to XML. ospcat ospcat prints effective system identifiers found in the catalogs. ospent ospent provides access to OpenSP's entity manager.