EN 16931 Rules and KSA Rules document?

I am looking for Rules guide details where i can get the information about errors, any document in PDF form or any online link. Do share.
Also share UBL specifications online dictionary link or PDF. thanks

Document name: Electronic Invoice XML Implementation Standard (ZATCA)
Brief description: Defines the XML structure, fields, and validation rules for ZATCA-compliant e-invoices.
Download: https://zatca.gov.sa/ar/E-Invoicing/SystemsDevelopers/Documents/20220624_ZATCA_Electronic_Invoice_XML_Implementation_Standard_vF.pdf

Document name: E‑Invoicing Detailed Technical Guideline (ZATCA)
Brief description: Provides in-depth guidance on document types, submission rules, and validation for e-invoicing.
Download: https://zatca.gov.sa/en/E-Invoicing/Introduction/Guidelines/Documents/E-invoicing-Detailed-Technical-Guideline.pdf

Document name: E-Invoicing Implementation Resolution (ZATCA)
Brief description: Explains the legal framework for e-invoicing in Saudi Arabia.
Download: https://zatca.gov.sa/en/E-Invoicing/Introduction/LawsAndRegulations/Documents/E-Invoicing%20Implementation%20Resolution_EN.pdf

Document name: Electronic Invoice Data Dictionary (ZATCA)
Brief description: Contains field definitions, code lists, and data specifications for ZATCA-compliant XML invoices.
Download: https://zatca.gov.sa/en/E-Invoicing/SystemsDevelopers/Pages/E-Invoice-specifications.aspx

Document name: UBL 2.1 Official Specification & Schema Package (OASIS)
Brief description: Full UBL 2.1 standard including schemas, code-lists, and data dictionary.
Download: https://docs.oasis-open.org/ubl/UBL-2.1.html

Document name: Universal Business Language Overview (UBL)
Brief description: High-level conceptual overview of UBL, its purpose, and document types.
Download: https://ibiblio.org/bosak/ubl/pres/generic-ubl-overview.pdf

Document name: OASIS UBL Technical Committee Resources
Brief description: Provides updates, references, and technical resources for UBL.
Download: https://www.oasis-open.org/committees/tc_home.php?wg_abbrev=ubl