  The RDF Mapping Language (RML) enables, among other formats, the mapping of
tabular data as Comma-Separated Values (CSV) files to RDF graphs.
Unfortunately, the widely used spreadsheet format is currently neglected by its
specification and well-known implementations. Therefore, we extended one of the
tools which is RML Mapper to support Microsoft Excel spreadsheet files and
demonstrate its capabilities in an interactive online demo. Our approach allows
to access various meta data of spreadsheet cells in typical RML maps. Some
experimental features for more specific use cases are also provided. The
implementation code is publicly available in a GitHub fork.
