This dataset is for the publication "Exploring ORCID adoption and metadata presence in Spain's research landscape" and is composed of the following files: norm_aff.tsv (2795x5) - Curated list of role titles openalex_all_spanish.csv (811062x4) - List of Spanish authors retrieved from OpenAlex orcid_affiliation.csv (377377x23) - Activity employment affiliation of Spanish ORCID records orcid_full_maps.csv (15182292x6)- Topic classification of Spanish ORCID records orcid_metrics.csv (226512x39) - Metadata availability in Spanish ORCID records