Colonel William A. Phillips Main menu Main menu move to sidebar hide Navigation Main pageContentsCurrent eventsRandom articleAbout WikipediaContact usDonate Contribute HelpLearn to editCommunity portalRecent changesUpload file Search Search Create account Log in Personal tools Create account Log in Pages for logged out editors learn more ContributionsTalk Contents move to sidebar hide (Top) 1External links Toggle the table of contents Add languages Add links ArticleTalk English ReadView history Tools Tools move to sidebar hide Actions ReadView history General What links hereRelated changesUpload fileSpecial pagesPermanent linkPage informationCite this pageGet shortened URLDownload QR codeWikidata item Print/export Download as PDFPrintable version In its simplest form, a Namespace Routing Language (NRL) schema consists of a mapping from namespace URIs to schema URIs. An NRL schema is written in XML. DSDL Part 4 (ISO/IEC 19757-4), NVDL is based on NRL. External links NRL home page NVDL information Toggle limited content width