Based specifically on Section 7.2 “Resource categories” and the related Knowledge Hub requirements in Sections 7.3 and 12 of the document, a regular WordPress Post can be extended with the following custom fields. The document defines six resource categories and also specifies metadata for filtering and display.Based specifically on Section 7.2 “Resource categories” and the related Knowledge Hub requirements in Sections 7.3 and 12 of the document, a regular WordPress Post can be extended with the following custom fields. The document defines six resource categories and also specifies metadata for filtering and display.