pycsw is an OGC CSW server implementation written in Python. pycsw fully implements the OpenGIS Catalogue Service Implementation Specification [Catalogue Service for the Web]. Initial development started in 2010 (more formally announced in 2011). The project is certified OGC Compliant, and is an OGC Reference Implementation. pycsw allows for the publishing and discovery of geospatial metadata via numerous APIs (CSW 2/CSW 3, OpenSearch, OAI-PMH, SRU). Existing repositories of geospatial metadata can also be exposed, providing a standards-based metadata and catalogue component of spatial data infrastructures. pycsw is Open Source, released under an MIT license, and runs on all major platforms (Windows, Linux, Mac OS X). Please read the docs at https://pycsw.org/docs for more information.
I noticed some unexpected parsing issues when parsing DC rdf/xml files
dc:identifer is not always populated; which leads to a db error indicating identifier is non nillable; suggestion here is to use the identifier of the record rdf:about='{id}' as alternate identifier
DC and DCTERMS have some duplicate terms (title, description, language format, date), which in the ontology are replaceable, i wonder if the parser would pick it up, my impression is not
in many cases dc:description is used in stead of dct:abstract
contacts property on record is not populated for creator, publisher, ...
links property on record is not populated from relation, source, ...
I noticed some unexpected parsing issues when parsing DC rdf/xml files