# DT-CIUS-PT-020_5.3

Source: https://xmlvalid.com/rules/DT-CIUS-PT-020_5.3

> The BT-22 does not meet the defined format: it is mandatory to prefix the value with the following '#ADDITIONALPROPERTY#' and suffice with '#'. The value must consist of a first part for the name, separated by "#", and for a second part for the value.

- Level: error
- Rule sets: CIUS-PT rules (Portugal, UBL) 2.1.1
- Context: `//ubl:Invoice/cbc:Note | //cn:CreditNote/cbc:Note`
- Test: `starts-with(normalize-space(.),'#ADDITIONALPROPERTY#') and not(matches(.,'^(#(ADDITIONALPROPERTY)#(.{1,50})#(.{1,50})#)$'))`

Validate a document against these rules: https://xmlvalid.com/validate