diff --git a/package.json b/package.json
index 8400ce1..86fa2bc 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "wgxpath",
   "description": "Wicked Good XPath",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "url": "https://github.com/google/wicked-good-xpath",
   "homepage": "https://github.com/jacobmarble/node-wgxpath",
   "author": {
diff --git a/wgxpath.install.js b/wgxpath.install.js
index cd5c749..8ec9403 100644
--- a/wgxpath.install.js
+++ b/wgxpath.install.js
@@ -52,41 +52,26 @@ R("lang",2,!1,!1,function(){return!1},1);R("last",1,!0,!1,function(a){if(1!=argu
 R("normalize-space",3,!1,!0,function(a,b){return(b?L(b,a):z(a.a)).replace(/[\s\xa0]+/g," ").replace(/^\s+|\s+$/g,"")},0,1);R("not",2,!1,!1,function(a,b){return!M(b,a)},1);R("number",1,!1,!0,function(a,b){return b?K(b,a):+z(a.a)},0,1);R("position",1,!0,!1,function(a){return a.b},0);R("round",1,!1,!1,function(a,b){return Math.round(K(b,a))},1);R("starts-with",2,!1,!1,function(a,b,c){b=L(b,a);a=L(c,a);return 0==b.lastIndexOf(a,0)},2);R("string",3,!1,!0,function(a,b){return b?L(b,a):z(a.a)},0,1);
 R("string-length",1,!1,!0,function(a,b){return(b?L(b,a):z(a.a)).length},0,1);R("substring",3,!1,!1,function(a,b,c,d){c=K(c,a);if(isNaN(c)||Infinity==c||-Infinity==c)return"";d=d?K(d,a):Infinity;if(isNaN(d)||-Infinity===d)return"";c=Math.round(c)-1;var e=Math.max(c,0);a=L(b,a);return Infinity==d?a.substring(e):a.substring(e,c+Math.round(d))},2,3);R("substring-after",3,!1,!1,function(a,b,c){b=L(b,a);a=L(c,a);c=b.indexOf(a);return-1==c?"":b.substring(c+a.length)},2);
 R("substring-before",3,!1,!1,function(a,b,c){b=L(b,a);a=L(c,a);a=b.indexOf(a);return-1==a?"":b.substring(0,a)},2);R("sum",1,!1,!1,function(a,b){for(var c=H(b.a(a)),d=0,e=I(c);e;e=I(c))d+=+z(e);return d},1,1,!0);R("translate",3,!1,!1,function(a,b,c,d){b=L(b,a);c=L(c,a);var e=L(d,a);a={};for(d=0;d<c.length;d++){var f=c.charAt(d);f in a||(a[f]=e.charAt(d))}c="";for(d=0;d<b.length;d++)f=b.charAt(d),c+=f in a?a[f]:f;return c},3);R("true",2,!1,!1,function(){return!0},0);function G(a,b){this.h=a;this.c=void 0!==b?b:null;this.b=null;switch(a){case "comment":this.b=8;break;case "text":this.b=3;break;case "processing-instruction":this.b=7;break;case "node":break;default:throw Error("Unexpected argument");}}function db(a){return"comment"==a||"text"==a||"processing-instruction"==a||"node"==a}G.prototype.a=function(a){return null===this.b||this.b==a.nodeType};G.prototype.f=function(){return this.h};
-G.prototype.toString=function(){var a="Kind Test: "+this.h;null===this.c||(a+=J(this.c));return a};function eb(a){this.b=a;this.a=0}function fb(a){a=a.match(gb);for(var b=0;b<a.length;b++)hb.test(a[b])&&a.splice(b,1);return new eb(a)}var gb=/\$?(?:(?![0-9-\.])(?:\*|[\w-\.]+):)?(?![0-9-\.])(?:\*|[\w-\.]+)|\/\/|\.\.|::|\d+(?:\.\d*)?|\.\d+|"[^"]*"|'[^']*'|[!<>]=|\s+|./g,hb=/^\s/;function S(a,b){return a.b[a.a+(b||0)]}function T(a){return a.b[a.a++]}function ib(a){return a.b.length<=a.a};function jb(a){n.call(this,3);this.c=a.substring(1,a.length-1)}m(jb);jb.prototype.a=function(){return this.c};jb.prototype.toString=function(){return"Literal: "+this.c};function E(a,b){this.j=a.toLowerCase();var c;c="*"==this.j?"*":"http://www.w3.org/1999/xhtml";this.c=b?b.toLowerCase():c}E.prototype.a=function(a){var b=a.nodeType;return 1!=b&&2!=b?!1:"*"!=this.j&&this.j!=a.localName.toLowerCase()?!1:"*"==this.c?!0:this.c==(a.namespaceURI?a.namespaceURI.toLowerCase():"http://www.w3.org/1999/xhtml")};E.prototype.f=function(){return this.j};E.prototype.toString=function(){return"Name Test: "+("http://www.w3.org/1999/xhtml"==this.c?"":this.c+":")+this.j};function kb(a){switch(a.nodeType){case 1:return ea(lb,a);case 9:return kb(a.documentElement);case 11:case 10:case 6:case 12:return mb;default:return a.parentNode?kb(a.parentNode):mb}}function mb(){return null}function lb(a,b){if(a.prefix==b)return a.namespaceURI||"http://www.w3.org/1999/xhtml";var c=a.getAttributeNode("xmlns:"+b);return c&&c.specified?c.value||null:a.parentNode&&9!=a.parentNode.nodeType?lb(a.parentNode,b):null};function nb(a){n.call(this,1);this.c=a}m(nb);nb.prototype.a=function(){return this.c};nb.prototype.toString=function(){return"Number: "+this.c};function ob(a,b){n.call(this,a.i);this.h=a;this.c=b;this.g=a.g;this.b=a.b;if(1==this.c.length){var c=this.c[0];c.u||c.c!=pb||(c=c.o,"*"!=c.f()&&(this.f={name:c.f(),s:null}))}}m(ob);function qb(){n.call(this,4)}m(qb);qb.prototype.a=function(a){var b=new C;a=a.a;9==a.nodeType?F(b,a):F(b,a.ownerDocument);return b};qb.prototype.toString=function(){return"Root Helper Expression"};function rb(){n.call(this,4)}m(rb);rb.prototype.a=function(a){var b=new C;F(b,a.a);return b};rb.prototype.toString=function(){return"Context Helper Expression"};
-function sb(a){return"/"==a||"//"==a}ob.prototype.a=function(a){var b=this.h.a(a);if(!(b instanceof C))throw Error("Filter expression must evaluate to nodeset.");a=this.c;for(var c=0,d=a.length;c<d&&b.l;c++){var e=a[c],f=H(b,e.c.a),g;if(e.g||e.c!=tb)if(e.g||e.c!=ub)for(g=I(f),b=e.a(new Q(g));null!=(g=I(f));)g=e.a(new Q(g)),b=Pa(b,g);else g=I(f),b=e.a(new Q(g));else{for(g=I(f);(b=I(f))&&(!g.contains||g.contains(b))&&b.compareDocumentPosition(g)&8;g=b);b=e.a(new Q(g))}}return b};
-ob.prototype.toString=function(){var a;a="Path Expression:"+J(this.h);if(this.c.length){var b=t(this.c,function(a,b){return a+J(b)},"Steps:");a+=J(b)}return a};function vb(a){n.call(this,4);this.c=a;Ua(this,ja(this.c,function(a){return a.g}));Va(this,ja(this.c,function(a){return a.b}))}m(vb);vb.prototype.a=function(a){var b=new C;r(this.c,function(c){c=c.a(a);if(!(c instanceof C))throw Error("Path expression must evaluate to NodeSet.");b=Pa(b,c)});return b};vb.prototype.toString=function(){return t(this.c,function(a,b){return a+J(b)},"Union Expression:")};function wb(a,b){this.a=a;this.b=!!b}
+G.prototype.toString=function(){var a="Kind Test: "+this.h;null===this.c||(a+=J(this.c));return a};function eb(a){this.b=a;this.a=0}function fb(a){a=a.match(gb);for(var b=0;b<a.length;b++)hb.test(a[b])&&a.splice(b,1);return new eb(a)}var gb=/\$?(?:(?![0-9-\.])(?:\*|[\w-\.]+):)?(?![0-9-\.])(?:\*|[\w-\.]+)|\/\/|\.\.|::|\d+(?:\.\d*)?|\.\d+|"[^"]*"|'[^']*'|[!<>]=|\s+|./g,hb=/^\s/;function S(a,b){return a.b[a.a+(b||0)]}function T(a){return a.b[a.a++]}function ib(a){return a.b.length<=a.a};function jb(a){n.call(this,3);this.c=a.substring(1,a.length-1)}m(jb);jb.prototype.a=function(){return this.c};jb.prototype.toString=function(){return"Literal: "+this.c};function E(a,b){this.j=a.toLowerCase();var c;c="*"==this.j?"*":"http://www.w3.org/1999/xhtml";this.c=b?b.toLowerCase():c}E.prototype.a=function(a){var b=a.nodeType;if(1!=b&&2!=b)return!1;b=void 0!==a.localName?a.localName:a.nodeName;return"*"!=this.j&&this.j!=b.toLowerCase()?!1:"*"==this.c?!0:this.c==(a.namespaceURI?a.namespaceURI.toLowerCase():"http://www.w3.org/1999/xhtml")};E.prototype.f=function(){return this.j};
+E.prototype.toString=function(){return"Name Test: "+("http://www.w3.org/1999/xhtml"==this.c?"":this.c+":")+this.j};function kb(a,b){n.call(this,a.i);this.h=a;this.c=b;this.g=a.g;this.b=a.b;if(1==this.c.length){var c=this.c[0];c.u||c.c!=lb||(c=c.o,"*"!=c.f()&&(this.f={name:c.f(),s:null}))}}m(kb);function mb(){n.call(this,4)}m(mb);mb.prototype.a=function(a){var b=new C;a=a.a;9==a.nodeType?F(b,a):F(b,a.ownerDocument);return b};mb.prototype.toString=function(){return"Root Helper Expression"};function nb(){n.call(this,4)}m(nb);nb.prototype.a=function(a){var b=new C;F(b,a.a);return b};nb.prototype.toString=function(){return"Context Helper Expression"};
+function ob(a){return"/"==a||"//"==a}kb.prototype.a=function(a){var b=this.h.a(a);if(!(b instanceof C))throw Error("Filter expression must evaluate to nodeset.");a=this.c;for(var c=0,d=a.length;c<d&&b.l;c++){var e=a[c],f=H(b,e.c.a),g;if(e.g||e.c!=pb)if(e.g||e.c!=qb)for(g=I(f),b=e.a(new Q(g));null!=(g=I(f));)g=e.a(new Q(g)),b=Pa(b,g);else g=I(f),b=e.a(new Q(g));else{for(g=I(f);(b=I(f))&&(!g.contains||g.contains(b))&&b.compareDocumentPosition(g)&8;g=b);b=e.a(new Q(g))}}return b};
+kb.prototype.toString=function(){var a;a="Path Expression:"+J(this.h);if(this.c.length){var b=t(this.c,function(a,b){return a+J(b)},"Steps:");a+=J(b)}return a};function rb(a){n.call(this,4);this.c=a;Ua(this,ja(this.c,function(a){return a.g}));Va(this,ja(this.c,function(a){return a.b}))}m(rb);rb.prototype.a=function(a){var b=new C;r(this.c,function(c){c=c.a(a);if(!(c instanceof C))throw Error("Path expression must evaluate to NodeSet.");b=Pa(b,c)});return b};rb.prototype.toString=function(){return t(this.c,function(a,b){return a+J(b)},"Union Expression:")};function sb(a,b){this.a=a;this.b=!!b}
 function $a(a,b,c){for(c=c||0;c<a.a.length;c++)for(var d=a.a[c],e=H(b),f=b.l,g,h=0;g=I(e);h++){var p=a.b?f-h:h+1;g=d.a(new Q(g,p,f));if("number"==typeof g)p=p==g;else if("string"==typeof g||"boolean"==typeof g)p=!!g;else if(g instanceof C)p=0<g.l;else throw Error("Predicate.evaluate returned an unexpected type.");if(!p){p=e;g=p.f;var y=p.a;if(!y)throw Error("Next must be called at least once before remove.");var D=y.b,y=y.a;D?D.a=y:g.a=y;y?y.b=D:g.b=D;g.l--;p.a=null}}return b}
-wb.prototype.toString=function(){return t(this.a,function(a,b){return a+J(b)},"Predicates:")};function U(a,b,c,d){n.call(this,4);this.c=a;this.o=b;this.h=c||new wb([]);this.u=!!d;b=this.h;b=0<b.a.length?b.a[0].f:null;a.b&&b&&(a=b.name,a=w?a.toLowerCase():a,this.f={name:a,s:b.s});a:{a=this.h;for(b=0;b<a.a.length;b++)if(c=a.a[b],c.g||1==c.i||0==c.i){a=!0;break a}a=!1}this.g=a}m(U);
-U.prototype.a=function(a){var b=a.a,c=null,c=this.f,d=null,e=null,f=0;c&&(d=c.name,e=c.s?L(c.s,a):null,f=1);if(this.u)if(this.g||this.c!=xb)if(a=H((new U(yb,new G("node"))).a(a)),b=I(a))for(c=this.m(b,d,e,f);null!=(b=I(a));)c=Pa(c,this.m(b,d,e,f));else c=new C;else c=B(this.o,b,d,e),c=$a(this.h,c,f);else c=this.m(a.a,d,e,f);return c};U.prototype.m=function(a,b,c,d){a=this.c.f(this.o,a,b,c);return a=$a(this.h,a,d)};
-U.prototype.toString=function(){var a;a="Step:"+J("Operator: "+(this.u?"//":"/"));this.c.j&&(a+=J("Axis: "+this.c));a+=J(this.o);if(this.h.a.length){var b=t(this.h.a,function(a,b){return a+J(b)},"Predicates:");a+=J(b)}return a};function zb(a,b,c,d){this.j=a;this.f=b;this.a=c;this.b=d}zb.prototype.toString=function(){return this.j};var Ab={};function V(a,b,c,d){if(Ab.hasOwnProperty(a))throw Error("Axis already created: "+a);b=new zb(a,b,c,!!d);return Ab[a]=b}
+sb.prototype.toString=function(){return t(this.a,function(a,b){return a+J(b)},"Predicates:")};function U(a,b,c,d){n.call(this,4);this.c=a;this.o=b;this.h=c||new sb([]);this.u=!!d;b=this.h;b=0<b.a.length?b.a[0].f:null;a.b&&b&&(a=b.name,a=w?a.toLowerCase():a,this.f={name:a,s:b.s});a:{a=this.h;for(b=0;b<a.a.length;b++)if(c=a.a[b],c.g||1==c.i||0==c.i){a=!0;break a}a=!1}this.g=a}m(U);
+U.prototype.a=function(a){var b=a.a,c=null,c=this.f,d=null,e=null,f=0;c&&(d=c.name,e=c.s?L(c.s,a):null,f=1);if(this.u)if(this.g||this.c!=tb)if(a=H((new U(ub,new G("node"))).a(a)),b=I(a))for(c=this.m(b,d,e,f);null!=(b=I(a));)c=Pa(c,this.m(b,d,e,f));else c=new C;else c=B(this.o,b,d,e),c=$a(this.h,c,f);else c=this.m(a.a,d,e,f);return c};U.prototype.m=function(a,b,c,d){a=this.c.f(this.o,a,b,c);return a=$a(this.h,a,d)};
+U.prototype.toString=function(){var a;a="Step:"+J("Operator: "+(this.u?"//":"/"));this.c.j&&(a+=J("Axis: "+this.c));a+=J(this.o);if(this.h.a.length){var b=t(this.h.a,function(a,b){return a+J(b)},"Predicates:");a+=J(b)}return a};function vb(a,b,c,d){this.j=a;this.f=b;this.a=c;this.b=d}vb.prototype.toString=function(){return this.j};var wb={};function V(a,b,c,d){if(wb.hasOwnProperty(a))throw Error("Axis already created: "+a);b=new vb(a,b,c,!!d);return wb[a]=b}
 V("ancestor",function(a,b){for(var c=new C,d=b;d=d.parentNode;)a.a(d)&&Qa(c,d);return c},!0);V("ancestor-or-self",function(a,b){var c=new C,d=b;do a.a(d)&&Qa(c,d);while(d=d.parentNode);return c},!0);
-var pb=V("attribute",function(a,b){var c=new C,d=a.f();if("style"==d&&b.style&&w)return F(c,new x(b.style,b,"style",b.style.cssText)),c;var e=b.attributes;if(e)if(a instanceof G&&null===a.b||"*"==d)for(var d=0,f;f=e[d];d++)w?f.nodeValue&&F(c,Da(b,f)):F(c,f);else(f=e.getNamedItem(d))&&(w?f.nodeValue&&F(c,Da(b,f)):F(c,f));return c},!1),xb=V("child",function(a,b,c,d,e){return(w?Ia:Ja).call(null,a,b,l(c)?c:null,l(d)?d:null,e||new C)},!1,!0);V("descendant",B,!1,!0);
-var yb=V("descendant-or-self",function(a,b,c,d){var e=new C;A(b,c,d)&&a.a(b)&&F(e,b);return B(a,b,c,d,e)},!1,!0),tb=V("following",function(a,b,c,d){var e=new C;do for(var f=b;f=f.nextSibling;)A(f,c,d)&&a.a(f)&&F(e,f),e=B(a,f,c,d,e);while(b=b.parentNode);return e},!1,!0);V("following-sibling",function(a,b){for(var c=new C,d=b;d=d.nextSibling;)a.a(d)&&F(c,d);return c},!1);V("namespace",function(){return new C},!1);
-var Bb=V("parent",function(a,b){var c=new C;if(9==b.nodeType)return c;if(2==b.nodeType)return F(c,b.ownerElement),c;var d=b.parentNode;a.a(d)&&F(c,d);return c},!1),ub=V("preceding",function(a,b,c,d){var e=new C,f=[];do f.unshift(b);while(b=b.parentNode);for(var g=1,h=f.length;g<h;g++){var p=[];for(b=f[g];b=b.previousSibling;)p.unshift(b);for(var y=0,D=p.length;y<D;y++)b=p[y],A(b,c,d)&&a.a(b)&&F(e,b),e=B(a,b,c,d,e)}return e},!0,!0);
-V("preceding-sibling",function(a,b){for(var c=new C,d=b;d=d.previousSibling;)a.a(d)&&Qa(c,d);return c},!0);var Cb=V("self",function(a,b){var c=new C;a.a(b)&&F(c,b);return c},!1);function Db(a){n.call(this,1);this.c=a;this.g=a.g;this.b=a.b}m(Db);Db.prototype.a=function(a){return-K(this.c,a)};Db.prototype.toString=function(){return"Unary Expression: -"+J(this.c)};function Eb(a,b){this.a=a;this.b=b}function Fb(a){for(var b,c=[];;){W(a,"Missing right hand side of binary expression.");b=Gb(a);var d=T(a.a);if(!d)break;var e=(d=Ya[d]||null)&&d.w;if(!e){a.a.a--;break}for(;c.length&&e<=c[c.length-1].w;)b=new N(c.pop(),c.pop(),b);c.push(b,d)}for(;c.length;)b=new N(c.pop(),c.pop(),b);return b}function W(a,b){if(ib(a.a))throw Error(b);}function Hb(a,b){var c=T(a.a);if(c!=b)throw Error("Bad token, expected: "+b+" got: "+c);}
-function Ib(a){a=T(a.a);if(")"!=a)throw Error("Bad token: "+a);}function Jb(a){a=T(a.a);if(2>a.length)throw Error("Unclosed literal string");return new jb(a)}
-function Kb(a){var b,c=[],d;if(sb(S(a.a))){b=T(a.a);d=S(a.a);if("/"==b&&(ib(a.a)||"."!=d&&".."!=d&&"@"!=d&&"*"!=d&&!/(?![0-9])[\w]/.test(d)))return new qb;d=new qb;W(a,"Missing next location step.");b=Lb(a,b);c.push(b)}else{a:{b=S(a.a);d=b.charAt(0);switch(d){case "$":throw Error("Variable reference not allowed in HTML XPath");case "(":T(a.a);b=Fb(a);W(a,'unclosed "("');Hb(a,")");break;case '"':case "'":b=Jb(a);break;default:if(isNaN(+b))if(!db(b)&&/(?![0-9])[\w]/.test(d)&&"("==S(a.a,1)){b=T(a.a);
-b=cb[b]||null;T(a.a);for(d=[];")"!=S(a.a);){W(a,"Missing function argument list.");d.push(Fb(a));if(","!=S(a.a))break;T(a.a)}W(a,"Unclosed function argument list.");Ib(a);b=new ab(b,d)}else{b=null;break a}else b=new nb(+T(a.a))}"["==S(a.a)&&(d=new wb(Mb(a)),b=new Za(b,d))}if(b)if(sb(S(a.a)))d=b;else return b;else b=Lb(a,"/"),d=new rb,c.push(b)}for(;sb(S(a.a));)b=T(a.a),W(a,"Missing next location step."),b=Lb(a,b),c.push(b);return new ob(d,c)}
-function Lb(a,b){var c,d,e;if("/"!=b&&"//"!=b)throw Error('Step op should be "/" or "//"');if("."==S(a.a))return d=new U(Cb,new G("node")),T(a.a),d;if(".."==S(a.a))return d=new U(Bb,new G("node")),T(a.a),d;var f;if("@"==S(a.a))f=pb,T(a.a),W(a,"Missing attribute name");else if("::"==S(a.a,1)){if(!/(?![0-9])[\w]/.test(S(a.a).charAt(0)))throw Error("Bad token: "+T(a.a));c=T(a.a);f=Ab[c]||null;if(!f)throw Error("No axis with name: "+c);T(a.a);W(a,"Missing node name")}else f=xb;c=S(a.a);if(/(?![0-9])[\w\*]/.test(c.charAt(0)))if("("==
-S(a.a,1)){if(!db(c))throw Error("Invalid node type: "+c);c=T(a.a);if(!db(c))throw Error("Invalid type name: "+c);Hb(a,"(");W(a,"Bad nodetype");e=S(a.a).charAt(0);var g=null;if('"'==e||"'"==e)g=Jb(a);W(a,"Bad nodetype");Ib(a);c=new G(c,g)}else if(c=T(a.a),e=c.indexOf(":"),-1==e)c=new E(c);else{var g=c.substring(0,e),h;if("*"==g)h="*";else if(h=a.b(g),!h)throw Error("Namespace prefix not declared: "+g);c=c.substr(e+1);c=new E(c,h)}else throw Error("Bad token: "+T(a.a));e=new wb(Mb(a),f.a);return d||
-new U(f,c,e,"//"==b)}function Mb(a){for(var b=[];"["==S(a.a);){T(a.a);W(a,"Missing predicate expression.");var c=Fb(a);b.push(c);W(a,"Unclosed predicate expression.");Hb(a,"]")}return b}function Gb(a){if("-"==S(a.a))return T(a.a),new Db(Gb(a));var b=Kb(a);if("|"!=S(a.a))a=b;else{for(b=[b];"|"==T(a.a);)W(a,"Missing next union location path."),b.push(Kb(a));a.a.a--;a=new vb(b)}return a};function Nb(a,b){if(!a.length)throw Error("Empty XPath expression.");var c=fb(a);if(ib(c))throw Error("Invalid XPath expression.");b?"function"==aa(b)||(b=da(b.lookupNamespaceURI,b)):b=function(){return null};var d=Fb(new Eb(c,b));if(!ib(c))throw Error("Bad token: "+T(c));this.evaluate=function(a,b){var c=d.a(new Q(a));return new Y(c,b)}}
+var lb=V("attribute",function(a,b){var c=new C,d=a.f();if("style"==d&&w&&b.style)return F(c,new x(b.style,b,"style",b.style.cssText)),c;var e=b.attributes;if(e)if(a instanceof G&&null===a.b||"*"==d)for(var d=0,f;f=e[d];d++)w?f.nodeValue&&F(c,Da(b,f)):F(c,f);else(f=e.getNamedItem(d))&&(w?f.nodeValue&&F(c,Da(b,f)):F(c,f));return c},!1),tb=V("child",function(a,b,c,d,e){return(w?Ia:Ja).call(null,a,b,l(c)?c:null,l(d)?d:null,e||new C)},!1,!0);V("descendant",B,!1,!0);
+var ub=V("descendant-or-self",function(a,b,c,d){var e=new C;A(b,c,d)&&a.a(b)&&F(e,b);return B(a,b,c,d,e)},!1,!0),pb=V("following",function(a,b,c,d){var e=new C;do for(var f=b;f=f.nextSibling;)A(f,c,d)&&a.a(f)&&F(e,f),e=B(a,f,c,d,e);while(b=b.parentNode);return e},!1,!0);V("following-sibling",function(a,b){for(var c=new C,d=b;d=d.nextSibling;)a.a(d)&&F(c,d);return c},!1);V("namespace",function(){return new C},!1);
+var xb=V("parent",function(a,b){var c=new C;if(9==b.nodeType)return c;if(2==b.nodeType)return F(c,b.ownerElement),c;var d=b.parentNode;a.a(d)&&F(c,d);return c},!1),qb=V("preceding",function(a,b,c,d){var e=new C,f=[];do f.unshift(b);while(b=b.parentNode);for(var g=1,h=f.length;g<h;g++){var p=[];for(b=f[g];b=b.previousSibling;)p.unshift(b);for(var y=0,D=p.length;y<D;y++)b=p[y],A(b,c,d)&&a.a(b)&&F(e,b),e=B(a,b,c,d,e)}return e},!0,!0);
+V("preceding-sibling",function(a,b){for(var c=new C,d=b;d=d.previousSibling;)a.a(d)&&Qa(c,d);return c},!0);var yb=V("self",function(a,b){var c=new C;a.a(b)&&F(c,b);return c},!1);function zb(a){n.call(this,1);this.c=a;this.g=a.g;this.b=a.b}m(zb);zb.prototype.a=function(a){return-K(this.c,a)};zb.prototype.toString=function(){return"Unary Expression: -"+J(this.c)};function Ab(a){n.call(this,1);this.c=a}m(Ab);Ab.prototype.a=function(){return this.c};Ab.prototype.toString=function(){return"Number: "+this.c};function Bb(a,b){this.a=a;this.b=b}function Cb(a){for(var b,c=[];;){W(a,"Missing right hand side of binary expression.");b=Db(a);var d=T(a.a);if(!d)break;var e=(d=Ya[d]||null)&&d.w;if(!e){a.a.a--;break}for(;c.length&&e<=c[c.length-1].w;)b=new N(c.pop(),c.pop(),b);c.push(b,d)}for(;c.length;)b=new N(c.pop(),c.pop(),b);return b}function W(a,b){if(ib(a.a))throw Error(b);}function Eb(a,b){var c=T(a.a);if(c!=b)throw Error("Bad token, expected: "+b+" got: "+c);}
+function Fb(a){a=T(a.a);if(")"!=a)throw Error("Bad token: "+a);}function Gb(a){a=T(a.a);if(2>a.length)throw Error("Unclosed literal string");return new jb(a)}
+function Hb(a){var b,c=[],d;if(ob(S(a.a))){b=T(a.a);d=S(a.a);if("/"==b&&(ib(a.a)||"."!=d&&".."!=d&&"@"!=d&&"*"!=d&&!/(?![0-9])[\w]/.test(d)))return new mb;d=new mb;W(a,"Missing next location step.");b=Ib(a,b);c.push(b)}else{a:{b=S(a.a);d=b.charAt(0);switch(d){case "$":throw Error("Variable reference not allowed in HTML XPath");case "(":T(a.a);b=Cb(a);W(a,'unclosed "("');Eb(a,")");break;case '"':case "'":b=Gb(a);break;default:if(isNaN(+b))if(!db(b)&&/(?![0-9])[\w]/.test(d)&&"("==S(a.a,1)){b=T(a.a);
+b=cb[b]||null;T(a.a);for(d=[];")"!=S(a.a);){W(a,"Missing function argument list.");d.push(Cb(a));if(","!=S(a.a))break;T(a.a)}W(a,"Unclosed function argument list.");Fb(a);b=new ab(b,d)}else{b=null;break a}else b=new Ab(+T(a.a))}"["==S(a.a)&&(d=new sb(Jb(a)),b=new Za(b,d))}if(b)if(ob(S(a.a)))d=b;else return b;else b=Ib(a,"/"),d=new nb,c.push(b)}for(;ob(S(a.a));)b=T(a.a),W(a,"Missing next location step."),b=Ib(a,b),c.push(b);return new kb(d,c)}
+function Ib(a,b){var c,d,e;if("/"!=b&&"//"!=b)throw Error('Step op should be "/" or "//"');if("."==S(a.a))return d=new U(yb,new G("node")),T(a.a),d;if(".."==S(a.a))return d=new U(xb,new G("node")),T(a.a),d;var f;if("@"==S(a.a))f=lb,T(a.a),W(a,"Missing attribute name");else if("::"==S(a.a,1)){if(!/(?![0-9])[\w]/.test(S(a.a).charAt(0)))throw Error("Bad token: "+T(a.a));c=T(a.a);f=wb[c]||null;if(!f)throw Error("No axis with name: "+c);T(a.a);W(a,"Missing node name")}else f=tb;c=S(a.a);if(/(?![0-9])[\w\*]/.test(c.charAt(0)))if("("==
+S(a.a,1)){if(!db(c))throw Error("Invalid node type: "+c);c=T(a.a);if(!db(c))throw Error("Invalid type name: "+c);Eb(a,"(");W(a,"Bad nodetype");e=S(a.a).charAt(0);var g=null;if('"'==e||"'"==e)g=Gb(a);W(a,"Bad nodetype");Fb(a);c=new G(c,g)}else if(c=T(a.a),e=c.indexOf(":"),-1==e)c=new E(c);else{var g=c.substring(0,e),h;if("*"==g)h="*";else if(h=a.b(g),!h)throw Error("Namespace prefix not declared: "+g);c=c.substr(e+1);c=new E(c,h)}else throw Error("Bad token: "+T(a.a));e=new sb(Jb(a),f.a);return d||
+new U(f,c,e,"//"==b)}function Jb(a){for(var b=[];"["==S(a.a);){T(a.a);W(a,"Missing predicate expression.");var c=Cb(a);b.push(c);W(a,"Unclosed predicate expression.");Eb(a,"]")}return b}function Db(a){if("-"==S(a.a))return T(a.a),new zb(Db(a));var b=Hb(a);if("|"!=S(a.a))a=b;else{for(b=[b];"|"==T(a.a);)W(a,"Missing next union location path."),b.push(Hb(a));a.a.a--;a=new rb(b)}return a};function Kb(a){switch(a.nodeType){case 1:return ea(Lb,a);case 9:return Kb(a.documentElement);case 11:case 10:case 6:case 12:return Mb;default:return a.parentNode?Kb(a.parentNode):Mb}}function Mb(){return null}function Lb(a,b){if(a.prefix==b)return a.namespaceURI||"http://www.w3.org/1999/xhtml";var c=a.getAttributeNode("xmlns:"+b);return c&&c.specified?c.value||null:a.parentNode&&9!=a.parentNode.nodeType?Lb(a.parentNode,b):null};function Nb(a,b){if(!a.length)throw Error("Empty XPath expression.");var c=fb(a);if(ib(c))throw Error("Invalid XPath expression.");b?"function"==aa(b)||(b=da(b.lookupNamespaceURI,b)):b=function(){return null};var d=Cb(new Bb(c,b));if(!ib(c))throw Error("Bad token: "+T(c));this.evaluate=function(a,b){var c=d.a(new Q(a));return new Y(c,b)}}
 function Y(a,b){if(0==b)if(a instanceof C)b=4;else if("string"==typeof a)b=2;else if("number"==typeof a)b=1;else if("boolean"==typeof a)b=3;else throw Error("Unexpected evaluation result.");if(2!=b&&1!=b&&3!=b&&!(a instanceof C))throw Error("value could not be converted to the specified type");this.resultType=b;var c;switch(b){case 2:this.stringValue=a instanceof C?Sa(a):""+a;break;case 1:this.numberValue=a instanceof C?+Sa(a):+a;break;case 3:this.booleanValue=a instanceof C?0<a.l:!!a;break;case 4:case 5:case 6:case 7:var d=
 H(a);c=[];for(var e=I(d);e;e=I(d))c.push(e instanceof x?e.a:e);this.snapshotLength=a.l;this.invalidIteratorState=!1;break;case 8:case 9:d=Ra(a);this.singleNodeValue=d instanceof x?d.a:d;break;default:throw Error("Unknown XPathResult type.");}var f=0;this.iterateNext=function(){if(4!=b&&5!=b)throw Error("iterateNext called with wrong result type");return f>=c.length?null:c[f++]};this.snapshotItem=function(a){if(6!=b&&7!=b)throw Error("snapshotItem called with wrong result type");return a>=c.length||
-0>a?null:c[a]}}Y.ANY_TYPE=0;Y.NUMBER_TYPE=1;Y.STRING_TYPE=2;Y.BOOLEAN_TYPE=3;Y.UNORDERED_NODE_ITERATOR_TYPE=4;Y.ORDERED_NODE_ITERATOR_TYPE=5;Y.UNORDERED_NODE_SNAPSHOT_TYPE=6;Y.ORDERED_NODE_SNAPSHOT_TYPE=7;Y.ANY_UNORDERED_NODE_TYPE=8;Y.FIRST_ORDERED_NODE_TYPE=9;function Ob(a){this.lookupNamespaceURI=kb(a)}
-function Pb(a,b){var c=a||k,d=c.document;if(!d.evaluate||b)c.XPathResult=Y,d.evaluate=function(a,b,c,d){return(new Nb(a,c)).evaluate(b,d)},d.createExpression=function(a,b){return new Nb(a,b)},d.createNSResolver=function(a){return new Ob(a)}}var Qb=["wgxpath","install"],Z=k;Qb[0]in Z||!Z.execScript||Z.execScript("var "+Qb[0]);for(var Rb;Qb.length&&(Rb=Qb.shift());)Qb.length||void 0===Pb?Z[Rb]?Z=Z[Rb]:Z=Z[Rb]={}:Z[Rb]=Pb;}).call(global)
-
-// Export for Node.js.
-module.exports.install = wgxpath.install;
-module.exports.XPathResultType = {
-  ANY_TYPE: 0,
-  NUMBER_TYPE: 1,
-  STRING_TYPE: 2,
-  BOOLEAN_TYPE: 3,
-  UNORDERED_NODE_ITERATOR_TYPE: 4,
-  ORDERED_NODE_ITERATOR_TYPE: 5,
-  UNORDERED_NODE_SNAPSHOT_TYPE: 6,
-  ORDERED_NODE_SNAPSHOT_TYPE: 7,
-  ANY_UNORDERED_NODE_TYPE: 8,
-  FIRST_ORDERED_NODE_TYPE: 9
-};
-
+0>a?null:c[a]}}Y.ANY_TYPE=0;Y.NUMBER_TYPE=1;Y.STRING_TYPE=2;Y.BOOLEAN_TYPE=3;Y.UNORDERED_NODE_ITERATOR_TYPE=4;Y.ORDERED_NODE_ITERATOR_TYPE=5;Y.UNORDERED_NODE_SNAPSHOT_TYPE=6;Y.ORDERED_NODE_SNAPSHOT_TYPE=7;Y.ANY_UNORDERED_NODE_TYPE=8;Y.FIRST_ORDERED_NODE_TYPE=9;function Ob(a){this.lookupNamespaceURI=Kb(a)}
+function Pb(a,b){var c=a||k,d=c.Document&&c.Document.prototype||c.document;if(!d.evaluate||b)c.XPathResult=Y,d.evaluate=function(a,b,c,d){return(new Nb(a,c)).evaluate(b,d)},d.createExpression=function(a,b){return new Nb(a,b)},d.createNSResolver=function(a){return new Ob(a)}}var Qb=["wgxpath","install"],Z=k;Qb[0]in Z||!Z.execScript||Z.execScript("var "+Qb[0]);for(var Rb;Qb.length&&(Rb=Qb.shift());)Qb.length||void 0===Pb?Z[Rb]?Z=Z[Rb]:Z=Z[Rb]={}:Z[Rb]=Pb;module.exports.install=Pb;module.exports.XPathResultType={ANY_TYPE:0,NUMBER_TYPE:1,STRING_TYPE:2,BOOLEAN_TYPE:3,UNORDERED_NODE_ITERATOR_TYPE:4,ORDERED_NODE_ITERATOR_TYPE:5,UNORDERED_NODE_SNAPSHOT_TYPE:6,ORDERED_NODE_SNAPSHOT_TYPE:7,ANY_UNORDERED_NODE_TYPE:8,FIRST_ORDERED_NODE_TYPE:9};}).call(global)