Metadata provides information about spatial data and is a key component of spatial data infrastructures (SDIs). The INSPIRE Directive mandates metadata for specific spatial themes. It requires metadata to be created and kept up to date according to timelines. INSPIRE metadata must conform to technical guidelines based on ISO 19115 and 19119 standards but conformance to ISO does not guarantee conformance to INSPIRE. The Plan4All project aims to implement INSPIRE metadata requirements for specific themes and define an overall spatial planning metadata profile.