Fix test fromRdf#t0027.

Author: davidlehn

lib/fromRdf.js

@@ -350,10 +350,12 @@ function _RDFToObject(o, useNativeTypes, rdfDirection, options) {
     // use native types for certain xsd types
     if(useNativeTypes) {
       if(type === XSD_BOOLEAN) {
-        if(rval['@value'] === 'true') {
+        if(rval['@value'] === 'true' || rval['@value'] === '1') {
           rval['@value'] = true;
-        } else if(rval['@value'] === 'false') {
+        } else if(rval['@value'] === 'false' || rval['@value'] === '0') {
           rval['@value'] = false;
+        } else if(rval['@value'] === 'True' || rval['@value'] === 'False') {
+          rval['@type'] = type;
         }
       } else if(types.isNumeric(rval['@value'])) {
         if(type === XSD_INTEGER) {
@@ -364,6 +366,10 @@ function _RDFToObject(o, useNativeTypes, rdfDirection, options) {
         } else if(type === XSD_DOUBLE) {
           rval['@value'] = parseFloat(rval['@value']);
         }
+      } else if(type == XSD_DOUBLE) {
+        // if not numeric and double, include type
+        // occurs for valid strings such as "+INF", "-INF", and large values
+        rval['@type'] = type;
       }
       // do not add native type
       if(![XSD_BOOLEAN, XSD_INTEGER, XSD_DOUBLE, XSD_STRING].includes(type)) {