Field Definitions are Available Here
Collection
varstring(255)
Mandatory if applicable
A description of the coordinate system and its orientation to the surface of the Earth.
Central Body, Inertial (CBI)
LocalGeoreferenceInformation
Central Body, Inertial (CBI)
Must be used with LocalGeoreferenceInformation.
METADATA > COLLECTIONMETADATA > Spatial > CoordinateSystemContainer > HorizontalCoordinateSystemContainer > LocalCoordinateSystem.LocalCoordinateSystemDescription
/gmi:MI_Metadata/gmd:spatialRepresentationInfo/gmd:MD_Georeferenceable/gmd:parameterCitation/gmd:CI_Citation/gmd:title/gco:CharacterString
Consider: MD_CoordinateReferenceSystem description
Spatial Information