1<schema xmlns="http://www.ascc.net/xml/schematron" > 2 <pattern name="Number of characters in an abbreviation"> 3 <rule context="BBB"> 4 <report test="string-length(@bbb) < 2">There is not enough letters in the abbreviation</report> 5 <report test="string-length(@bbb) > 3">There is too much letters in the abbreviation</report> 6 </rule> 7 </pattern> 8</schema> 9