libraries/tbs/plugins/tbs_plugin_opentbs.php
function XML_BlockAlias_Prefix($TagPrefix, $Txt, $PosBeg, $Forward, $LevelStop) {

		$loc = clsTbsXmlLoc::FindStartTagByPrefix($Txt, $TagPrefix, $PosBeg, false);

		if ($Forward) {
			$loc->FindEndTag();
			return $loc->PosEnd;
		} else {
			return $loc->PosBeg;
		}

	}
function XML_BlockAlias_Prefix($TagPrefix, $Txt, $PosBeg, $Forward, $LevelStop) {

		$loc = clsTbsXmlLoc::FindStartTagByPrefix($Txt, $TagPrefix, $PosBeg, false);

		if ($Forward) {
			$loc->FindEndTag();
			return $loc->PosEnd;
		} else {
			return $loc->PosBeg;
		}

	}
Function used by Block Alias
The first start tag on the left is supposed to be the good one.
Note: encapuslation is not yet supported in this version.