diff --git a/source/Ox/js/Array.js b/source/Ox/js/Array.js
index 3309fcb5..6be9157a 100644
--- a/source/Ox/js/Array.js
+++ b/source/Ox/js/Array.js
@@ -2,16 +2,20 @@
 
 /*@
 Ox.api <f> Turns an array into a list API
-    (items) -> <f> List API
-    (items, keys) -> <f> List API
-    items <[o]> An array of objects
-    keys <[s]> Array of keys to be included in totals
+    (items, options) -> <f> List API
+    items <[o]> An array of objects (key/value stores)
+    options <o> Options object
+        enums <o> Enumerables, for example <code>{size: ['S', 'M', 'L', 'XL']}</code>
+        sums <[s]> List of keys to be included in totals
+        unique <s|'id'> The name of the unique key
     <script>
         Ox.test.api = Ox.api([
             {id: 'foo', n: 2},
             {id: 'bar', n: 2},
             {id: 'baz', n: 1}
-        ], ['n']);
+        ], {
+            sums: ['n']
+        });
         Ox.test.apiResults = {
             0: Ox.test.api(),
             1: Ox.test.api({
@@ -25,8 +29,8 @@ Ox.api <f> Turns an array into a list API
                 keys: [],
                 query: {
                     conditions: [
-                        {key: 'id', value: 'f', operator: '!^'},
-                        {key: 'n', value: 1, operator: '>'}
+                        {key: 'id', operator: '!^', value: 'f'},
+                        {key: 'n', operator: '>', value: 1}
                     ],
                     operator: '&'
                 }
@@ -35,8 +39,8 @@ Ox.api <f> Turns an array into a list API
                 keys: [],
                 query: {
                     conditions: [
-                        {key: 'id', value: 'O', operator: '='},
-                        {key: 'n', value: [1, 2], operator: '='}
+                        {key: 'id', operator: '=', value: 'O'},
+                        {key: 'n', operator: '=', value: [1, 2]}
                     ],
                     operator: '|'
                 },
@@ -46,11 +50,11 @@ Ox.api <f> Turns an array into a list API
                 keys: [],
                 query: {
                     conditions: [
-                        {key: 'id', value: 'f', operator: '='},
+                        {key: 'id', operator: '=', value: 'f'},
                         {
                             conditions: [
-                                {key: 'id', value: 'a', operator: '='},
-                                {key: 'id', value: 'z', operator: '='}
+                                {key: 'id', operator: '=', value: 'a'},
+                                {key: 'id', operator: '=', value: 'z'}
                             ],
                             operator: '&'
                         }
@@ -63,8 +67,28 @@ Ox.api <f> Turns an array into a list API
                 keys: [],
                 range: [1, 2],
                 sort: ['+id']
+            }),
+            7: Ox.test.api({
+                positions: ['foo', 'bar'],
+                sort: ['+id']
             })
         };
+        Ox.test.api = Ox.api([
+            {i: 0, size: 'S'},
+            {i: 1, size: 'M'},
+            {i: 2, size: 'L'}
+        ], {
+            enums: {size: ['S', 'M', 'L']},
+            unique: 'i'
+        });
+        Ox.test.apiResults[8] = Ox.test.api({
+            keys: ['size'],
+            query: {
+                conditions: [{key: 'size', operator: '>=', value: 'M'}],
+                operator: '&'
+            },
+            sort: [{key: 'size', operator: '-'}]
+        });
     </script>
     > Ox.test.apiResults[0].data
     {items: 3, n: 5}
@@ -80,9 +104,67 @@ Ox.api <f> Turns an array into a list API
     {items: [{id: 'baz', n: 1}, {id: 'foo', n: 2}]}
     > Ox.test.apiResults[6].data
     {items: [{id: 'baz', n: 1}]}
+    > Ox.test.apiResults[7].data
+    {positions: {foo: 2, bar: 0}}
+    > Ox.test.apiResults[8].data
+    {items: [{i: 2, size: 'L'}, {i: 1, size: 'M'}]}
 @*/
-Ox.api = function(items, keys) {
-    keys = keys || [];
+Ox.api = function(items, options) {
+
+    var enums = options.enums ? parseEnums(options.enums) : {},
+        sums = options.sums || [],
+        unique = options.unique || 'id';
+
+    function parseEnums(enums) {
+        // make enumerable strings lowercase
+        return Ox.map(enums, function(values) {
+            return values.map(function(value) {
+                return value.toLowerCase();
+            });
+        });
+    }
+
+    function parseConditions(conditions) {
+        // make string values lowercase,
+        // and replace enumerable strings used with the
+        // <, !<, <=, !<=, >, !>, >= or !>= operator
+        // with their index
+        return conditions.map(function(condition) {
+            var key = condition.key,
+                operator = condition.operator,
+                values = Ox.toArray(condition.value);
+            if (condition.conditions) {
+                condition.conditions = parseConditions(condition.conditions);
+            } else {
+                values = values.map(function(value) {
+                    if (Ox.isString(value)) {
+                        value = value.toLowerCase();
+                    }
+                    if (enums[key] && (
+                        operator.indexOf('<') > -1
+                        || operator.indexOf('>') > -1
+                    )) {
+                        value = enums[key].indexOf(value);
+                    }
+                    return value;
+                });
+                condition.value = Ox.isArray(condition.value)
+                    ? values : values[0];
+            }
+            return condition;
+        });
+    }
+
+    function parseSort(sort) {
+        // translate 'foo' to {key: 'foo', operator: '+'}
+        return sort.map(function(sort) {
+            return Ox.isString(sort) ? {
+                key: sort.replace(/^[\+\-]/, ''),
+                operator: sort[0] == '-' ? '-' : '+'
+            } : sort;
+        });
+    }
+
     function testCondition(item, condition) {
         var key = condition.key,
             operator = condition.operator.replace('!', ''),
@@ -97,20 +179,24 @@ Ox.api = function(items, keys) {
                 },
                 '==': function(a, b) { return a === b; },
                 '<': function(a, b) { return a < b; },
-                '>': function(a, b) { return a > b; },
                 '<=': function(a, b) { return a <= b; },
+                '>': function(a, b) { return a > b; },
                 '>=': function(a, b) { return a >= b; },
                 '^': function(a, b) { return Ox.starts(a, b); },
                 '$': function(a, b) { return Ox.ends(a, b); },
             };
-        if (Ox.isString(value)) {
-            value = value.toLowerCase();
-        }
         if (Ox.isString(itemValue)) {
             itemValue = itemValue.toLowerCase();
         }
+        if (enums[key] && (
+            operator.indexOf('<') > -1
+            || operator.indexOf('>') > -1
+        )) {
+            itemValue = enums[key].indexOf(itemValue);
+        }
         return test[operator](itemValue, value) == !not;
     }
+
     function testQuery(item, query) {
         var match = true;
         Ox.forEach(query.conditions, function(condition) {
@@ -128,22 +214,55 @@ Ox.api = function(items, keys) {
         });
         return match;
     }
+
     return function(options) {
         var data,
-            result = {data: {}, status: {code: 200, text: 'ok'}};
+            result = {data: {}, status: {code: 200, text: 'ok'}},
+            sort = {};
         options = options || {};
         if (options.query) {
+            // find
+            options.query.conditions = parseConditions(options.query.conditions);
             result.data.items = items.filter(function(item) {
                 return testQuery(item, options.query);
             });
         } else {
             result.data.items = Ox.clone(items);
         }
-        if (options.keys) {
-            if (options.sort) {
-                result.data.items = Ox.sortBy(result.data.items, options.sort);
-            }
+        if (options.sort) {
+            // sort
+            options.sort = parseSort(options.sort);
+            Ox.forEach(enums, function(values, key) {
+                sort[key] = function(value) {
+                    return values.indexOf(value.toLowerCase());
+                };
+            })
+            result.data.items = Ox.sortBy(result.data.items, options.sort, sort);
+        }
+        if (options.positions) {
+            // return positions
+            data = {positions: {}};
+            options.positions.forEach(function(id) {
+                data.positions[id] = Ox.getIndex(result.data.items, unique, id)
+            });
+            result.data = data;
+        } else if (!options.keys) {
+            // return totals
+            data = {};
+            sums.forEach(function(key) {
+                data[key] = Ox.sum(result.data.items.map(function(item) {
+                    return item[key];
+                }));
+            })
+            data.items = result.data.items.length;
+            result.data = data;
+        } else {
+            // return items
             if (!Ox.isEmpty(options.keys)) {
+                // filter keys
+                if (options.keys.indexOf(unique) == -1) {
+                    options.keys.push(unique);
+                }
                 result.data.items = result.data.items.map(function(item) {
                     var ret = {};
                     options.keys.forEach(function(key) {
@@ -153,21 +272,15 @@ Ox.api = function(items, keys) {
                 });
             }
             if (options.range) {
+                // apply range
                 result.data.items = Ox.sub(
                     result.data.items, options.range[0], options.range[1]
                 );
             }
-        } else {
-            data = {items: result.data.items.length};
-            keys.forEach(function(key) {
-                data[key] = Ox.sum(result.data.items.map(function(item) {
-                    return item[key];
-                }));
-            })
-            result.data = data;
         }
         return result;
     };
+
 };
 
 /*@
@@ -259,8 +372,11 @@ Ox.range = function() {
             len, matches = {}, sort = {};
         // find leading numbers
         arr.forEach(function(val, i) {
-            var match = /^\d+/.exec(arr_[i]);
-            matches[val] = match ? match[0] : '';
+            var match;
+            if (Ox.isString(val)) {
+                match = /^\d+/.exec(arr_[i]);
+                matches[val] = match ? match[0] : '';
+            }
         });
         // get length of longest leading number
         len = Ox.max(Ox.map(matches, function(val) {
@@ -269,13 +385,15 @@ Ox.range = function() {
         // pad leading numbers, make lowercase,
         // and remove leading non-word characters
         arr.forEach(function(val, i) {
-            sort[val] = (
-                matches[val]
-                ? arr_[i].toString().replace(
-                    matches[val], Ox.pad(matches[val], len)
-                )
-                : arr_[i]
-            ).toLowerCase().replace(/^\W+/, '');
+            sort[val] = Ox.isString(arr_[i])
+                ? (
+                    matches[val]
+                    ? arr_[i].replace(
+                        matches[val], Ox.pad(matches[val], len)
+                    )
+                    : arr_[i]
+                ).toLowerCase().replace(/^\W+/, '')
+                : arr_[i];
         });
         return sort;
     }
@@ -320,10 +438,10 @@ Ox.range = function() {
     Ox.sortBy = function(arr, by, fn) {
         var length = by.length, values = {};
         by = by.map(function(v) {
-            return {
+            return Ox.isString(v) ? {
                 key: v.replace(/^[\+\-]/, ''),
                 operator: v[0] == '-' ? '-' : '+'
-            };
+            } : v;
         });
         fn = fn || {};
         by.map(function(v) {
diff --git a/source/Ox/js/String.js b/source/Ox/js/String.js
index a3c05e92..68a969a4 100644
--- a/source/Ox/js/String.js
+++ b/source/Ox/js/String.js
@@ -46,6 +46,8 @@ Ox.endsWith <f> Checks if a string ends with a given substring
 @*/
 Ox.ends = Ox.endsWith = function(str, sub) {
     // fixme: rename to ends
+    str = str.toString();
+    sub = sub.toString();
     return str.substr(str.length - sub.length) == sub;
 };
 
@@ -427,6 +429,8 @@ Ox.startsWith <f> Checks if a string starts with a given substring
 @*/
 Ox.starts = Ox.startsWith = function(str, sub) {
     // fixme: rename to starts
+    str = str.toString();
+    sub = sub.toString();
     return str.substr(0, sub.length) == sub;
 };