I\'m looking for an editor that has the help from
http://www.hibernate.org/hib_docs/nhibernate/html/mapping.html
built in, and allows simple editing of the
I don't believe there is an editor for Hibernate/NHibernate mapping files that has context-sensitive help. If you are a .NET developer (using NHibernate and Visual Studio .NET) you can edit the mappings with IntelliSense by registering a schema document: see Using NHibernate with Visual Studio .NET for instructions.
Another option to consider is using the NHibernate's Fluent API. This replaces mapping files with strongly-typed C# code.