Opensp

• onsgmls(1) An SGML/XML parser and validator
• osgmlnorm(1) An SGML/XML document normalizer
• ospam(1) An SGML/XML markup stream editor
• ospcat(1) SGML print catalog
• ospent(1) Concatenates entities in an SGML/XML document
• osx(1) An SGML to XML converter