Projectspace or MEpedia-space refers to all pages with the prefix "MEpedia:". These generally include all of the documentation for how to work on the project. It contrasts with "mainspace", i.e. the main contents of the encyclopedia of ME knowledge! Unlike mainspace entries, projectspace entries are not indexed to appear in search engines. Instead they are searchable in the MEpedia search page: type in the prefix "MEpedia:" and then the term you are looking for.