ometa StreamParser <: Parser {
	sortingDef	= [sortingExpr:exp] -> exp,
	sortingExpr = fieldName:fn "ascending" -> { 'function(a, b) { var v1 = a' + fn + ', v2 = b' + fn + ';  return (v1 == v2 ? 0 : (v1 < v2 ? -1 : 1)) }' }
				| fieldName:fn "descending" -> { 'function(a, b) { var v1 = a' + fn + ', v2 = b' + fn + ';  return (v1 == v2 ? 0 : (v1 > v2 ? -1 : 1)) }' },

	filterDef	= [filterExpr:exp] -> exp,
	filterExpr	= fieldName:fn "starts with" spaces value:v -> { fn + '.startsWith("' + v + '")' }
				| fieldName:fn "ends with" spaces value:v -> { fn + '.endsWith("' + v + '")' }
				| fieldName:fn "contains" spaces value:v -> { fn + '.indexOf("' + v + '") > -1' }
				| fieldName:fn "is" spaces value:v -> { fn + ' == "' + v + '"' },
	fieldName	= namespaceId,
	value		= strValue,

	/* basic string processing */
	nameFirst		= letter | '$' | '_',
	nameRest		= nameFirst | digit,
	iName			= firstAndRest(#nameFirst, #nameRest):r -> r.join(''),
	nsName			= iName:n1 ':' iName:n2 -> { n1 + ':' + n2 },
	name			= iName:n -> n,
//					| nsName:n -> n,
	namespaceIdSplitted	= name:n '.' namespaceIdSplitted:r              -> { [n].concat(r) }
	                    | nsName:n                                      -> { [n] }
	                    | name:n                                        -> { [n] },
	namespaceId		= namespaceIdSplitted:nArr -> { '[\'' + nArr.join('\'][\'') + '\']'},
	fromTo :x :y	= seq(x) (~seq(y) char)*:cs seq(y) -> cs.join(''),
	word			= (~space char)*:l -> l.join(''),
	strValue		= ( fromTo('\'', '\'') | fromTo('"', '"') | word ):n -> n
}