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This group has annual meetings around the world (stand alone or in conjunction with IAOS International Association of Official Statistics). They are eager to work with others. There are several articles and contents of recent conferences. These organizations are part of ISI (International Statistical Institute). The IAOS has a publication which would provide exposure to official statisticians who are the primary audience.
DCAT - DDI alignment / profile
Working spreadsheet: https://docs.google.com/spreadsheets/d/1LT7u6QJqw3TwzOFCN8S-kaVp51SSRoGHlxkGKnga7w8/edit?usp=sharing
DDI 4 RDF page with links to GitHub and other outputs (upper right box on page) RDFS/OWL TeamNotes on DCAT moved