According to Article 468 of Regulation (EU) No 575/2013 (CRR) institutions shall remove from their Common Equity Tier 1 the applicable percentage of unrealised gains. Only the resulting amount shall not be removed from CET1. Since reductions of own funds have to reported as negative figures (see also Part I, chapter 1.3, paragraph 9 of Annex II to Regulation (EU) No 680/2014 - ITS on supervisory reporting), validation rule v2000_s is correct.
According to Article 17 (1) (b) (b) of the ITS on supervisory reporting percentages shall be expressed as per unit with a minimum precision equivalent to four decimals. The range of possible values is between 0 and 1 and therefore validation rule v2035_s is fulfilled.