ESMA's electronic reporting pages set out the ESEF regime: listed issuers publish annual financial reports in xHTML with the consolidated IFRS statements tagged in XBRL, with the taxonomy updated as standards evolve and sustainability disclosures next in line for digitisation.
Tagged reporting looks like a listed-company concern until you notice the direction: regulators and banks increasingly want data, not documents. SMEs already file digitally in the Netherlands, and the practical takeaway is to keep the bookkeeping structured so any required format is an export, not a project. Reports written for machines still get read by people.