diff --git a/README.md b/README.md
index 41f263e6..79ff91c7 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # validate
-[![version 1.0.2+1](https://img.shields.io/badge/pub-v1.0.2+1-brightgreen.svg)](https://pub.dartlang.org/packages/angel_validate)
+[![version 1.0.2+2](https://img.shields.io/badge/pub-v1.0.2+2-brightgreen.svg)](https://pub.dartlang.org/packages/angel_validate)
 [![build status](https://travis-ci.org/angel-dart/validate.svg)](https://travis-ci.org/angel-dart/validate)
 
 [Live Example](https://angel-dart.github.io/validate)
@@ -38,9 +38,14 @@ import 'package:angel_validate/angel_validate.dart';
 main() {
     var validator = new Validator({
         'username': isAlphaNum,
+        'multiple,keys,with,same,rules': [isString, isNotEmpty],
         'balance': [
             greaterThanOrEqualTo(0),
             lessThan(1000000)
+        ],
+        'nested': [
+            foo,
+            [bar, baz]
         ]
     });
 }
@@ -225,6 +230,7 @@ including:
 * `isInt`: Asserts that a value is an `int`.
 * `isNum`: Asserts that a value is a `num`.
 * `isString`: Asserts that a value is a `String`.
+* `isNonEmptyString`: Asserts that a value is a non-empty `String`.
 * `isUrl`: Asserts that a `String` is an HTTPS or HTTP URL.
 
 The remaining functionality is
diff --git a/lib/src/matchers.dart b/lib/src/matchers.dart
index a5a21f94..de2d22b8 100644
--- a/lib/src/matchers.dart
+++ b/lib/src/matchers.dart
@@ -32,12 +32,20 @@ final Matcher isNum = predicate((value) => value is num, 'a number');
 /// Asserts that a value is a `String`.
 final Matcher isString = predicate((value) => value is String, 'a String');
 
+/// Asserts that a value is a non-empty `String`.
+final Matcher isNonEmptyString = predicate(
+    (value) => value is String && value.isNotEmpty, 'a non-empty String');
+
 ///  Asserts that a `String` is an `http://` or `https://` URL.
 ///
 /// The regular expression used:
 /// ```
 /// https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}\b([-a-zA-Z0-9@:%_\+.~#?&//=]*)
 /// ```
-final Matcher isurl = predicate(
+final Matcher isUrl = predicate(
     (value) => value is String && _url.hasMatch(value),
     'a valid url, starting with http:// or https://');
+
+/// Use [isUrl] instead.
+@deprecated
+final Matcher isurl = isUrl;
diff --git a/lib/src/validator.dart b/lib/src/validator.dart
index 814b8304..06702aa2 100644
--- a/lib/src/validator.dart
+++ b/lib/src/validator.dart
@@ -76,8 +76,18 @@ class Validator extends Matcher {
           requiredFields.add(fieldName);
         }
 
-        Iterable iterable =
+        Iterable _iterable =
             schema[keys] is Iterable ? schema[keys] : [schema[keys]];
+        var iterable = [];
+
+        _addTo(x) {
+          if (x is Iterable)
+            x.map(_addTo);
+          else
+            iterable.add(x);
+        }
+
+        _iterable.map(_addTo);
 
         for (var rule in iterable) {
           if (rule is Matcher) {
diff --git a/pubspec.yaml b/pubspec.yaml
index 8adb14c3..cf7e2a6c 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: angel_validate
 description: Cross-platform validation library based on `matcher`.
-version: 1.0.2+1
+version: 1.0.2+2
 author: Tobe O <thosakwe@gmail.com>
 homepage: https://github.com/angel-dart/validate
 environment: