The Federated Data Catalog (FDC) represents the aggregated catalogs of multiple participants in a dataspace. To achieve that, the FDC employs a set of crawlers, that periodically scrape the dataspace requesting the catalog from each participant in a list of participants and consolidates them in a local cache. Keeping a locally cached version of every participant's catalog makes catalog queries more responsive and robust, and it can cause a reduction in network load.