cef: validate VATEX codes by pattern

CHANGELOG.md

@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 
 ## [Unreleased]
 
+### Changed
+
+- `catalogues/cef`: the `cef-vatex` extension validates VATEX codes against the pattern `^VATEX-[A-Z]{2}(-[A-Z0-9]+)+$` instead of enumerating the 75 official codes, so that the country codes admitted by national profiles, such as the French `VATEX-FR-CGI*` ones, are accepted. Each profile's schematron checks the codes it allows.
+
 ## [v0.503.0] - 2026-07-15
 
 ### Added

addons/eu/en16931/tax_combo_test.go

@@ -140,6 +140,19 @@ func TestTaxComboValidation(t *testing.T) {
 		assert.NoError(t, rules.Validate(c, tax.AddonContext(en16931.V2017)))
 	})
 
+	t.Run("country-extension vatex code passes the catalogue pattern", func(t *testing.T) {
+		c := &tax.Combo{
+			Category: tax.CategoryVAT,
+			Key:      tax.KeyExempt,
+			Ext: tax.ExtensionsOf(cbc.CodeMap{
+				"cef-vatex": "VATEX-FR-CGI261-1",
+			}),
+		}
+		norm.Normalize(c, tax.AddonContext(en16931.V2017))
+		err := rules.Validate(c, tax.AddonContext(en16931.V2017))
+		assert.NoError(t, err)
+	})
+
 	t.Run("reverse charge without vatex", func(t *testing.T) {
 		c := &tax.Combo{
 			Category: tax.CategoryVAT,

catalogues/cef/cef_test.go

@@ -1,11 +1,13 @@
 package cef_test
 
 import (
+	"regexp"
 	"testing"
 
 	_ "github.com/invopop/gobl"
 	"github.com/invopop/gobl/tax"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func TestInit(t *testing.T) {
@@ -14,3 +16,36 @@ func TestInit(t *testing.T) {
 	assert.NotNil(t, ed)
 	assert.Equal(t, "cef-vatex", ed.Key.String())
 }
+
+func TestVATEXPattern(t *testing.T) {
+	ed := tax.ExtensionForKey("cef-vatex")
+	require.NotNil(t, ed)
+	require.NotEmpty(t, ed.Pattern)
+	re := regexp.MustCompile(ed.Pattern)
+
+	valid := []string{
+		"VATEX-EU-79-C",
+		"VATEX-EU-132-1A",
+		"VATEX-EU-143-1FA",
+		"VATEX-EU-AE",
+		"VATEX-FR-FRANCHISE",
+		"VATEX-SA-34-1",
+		"VATEX-FR-CGI261-1", // outside the official list
+	}
+	for _, code := range valid {
+		assert.True(t, re.MatchString(code), code)
+	}
+
+	invalid := []string{
+		"EXEMPT-132",
+		"VATEX",
+		"VATEX-EU",
+		"VATEX-eu-132",
+		"vatex-EU-132",
+		"VATEX-E-132",
+		"VATEX-EU-132-",
+	}
+	for _, code := range invalid {
+		assert.False(t, re.MatchString(code), code)
+	}
+}