diff --git a/css/app.css b/css/app.css
index bd5fb13c9..2821fcffa 100644
--- a/css/app.css
+++ b/css/app.css
@@ -116,6 +116,11 @@ table th {
     text-align:left;
 }
 
+table.tags, table.tags td, table.tags th {
+    border: 1px solid #CCC;
+    padding: 4px;
+}
+
 /* UI Lists
 ------------------------------------------------------- */
 
diff --git a/index.html b/index.html
index e44acbd39..f55466c55 100644
--- a/index.html
+++ b/index.html
@@ -52,6 +52,7 @@
         <script src='js/id/ui/notice.js'></script>
         <script src='js/id/ui/flash.js'></script>
         <script src='js/id/ui/tag_reference.js'></script>
+        <script src='js/id/ui/key_reference.js'></script>
 
         <script src='js/id/actions.js'></script>
         <script src='js/id/actions/add_node.js'></script>
diff --git a/js/id/ui/inspector.js b/js/id/ui/inspector.js
index 52d96150c..c92162ba2 100644
--- a/js/id/ui/inspector.js
+++ b/js/id/ui/inspector.js
@@ -140,28 +140,49 @@ iD.Inspector = function() {
                 .attr('tabindex', -1)
                 .attr('target', '_blank')
                 .on('click', function(d) {
-                    taginfo.docs(_.extend({}, d, {
-                            geometry: entity.geometry()
-                        }), function(err, docs) {
-                        var en = _.find(docs, function(d) {
-                            return d.lang == 'en';
-                        });
-                        if (en) {
-                            var types = [];
-                            if (en.on_area) types.push('area');
-                            if (en.on_node) types.push('point');
-                            if (en.on_way) types.push('line');
-                            en.types = types;
-                            iD.modal()
-                                .select('.content')
-                                .datum(en)
-                                .call(iD.tagReference);
-                        } else {
-                            iD.flash()
-                                .select('.content')
-                                .text('This is no documentation available for this tag combination');
-                        }
+                    var params = _.extend({}, d, {
+                        geometry: entity.geometry()
                     });
+                    if (d.key && d.value) {
+                        taginfo.docs(params, function(err, docs) {
+                            var en = _.find(docs, function(d) {
+                                return d.lang == 'en';
+                            });
+                            if (en) {
+                                var types = [];
+                                if (en.on_area) types.push('area');
+                                if (en.on_node) types.push('point');
+                                if (en.on_way) types.push('line');
+                                en.types = types;
+                                console.log(en);
+                                iD.modal()
+                                    .select('.content')
+                                    .datum(en)
+                                    .call(iD.tagReference);
+                            } else {
+                                iD.flash()
+                                    .select('.content')
+                                    .text('This is no documentation available for this tag combination');
+                            }
+                        });
+                    } else if (d.key) {
+                        taginfo.values(params, function(err, values) {
+                            if (values.data.length) {
+                                iD.modal()
+                                    .select('.content')
+                                    .datum({
+                                        data: values.data,
+                                        title: 'Key:' + params.key,
+                                        geometry: params.geometry
+                                    })
+                                    .call(iD.keyReference);
+                            } else {
+                                iD.flash()
+                                    .select('.content')
+                                    .text('This is no documentation available for this key');
+                            }
+                        });
+                    }
                     d3.event.preventDefault();
                 })
                 .attr('href', function(d) {
diff --git a/js/id/ui/key_reference.js b/js/id/ui/key_reference.js
new file mode 100644
index 000000000..0fcdd1d04
--- /dev/null
+++ b/js/id/ui/key_reference.js
@@ -0,0 +1,37 @@
+iD.keyReference = function(selection) {
+    selection.each(function() {
+
+        var selection = d3.select(this),
+            data = selection.datum(),
+            header = selection.append('div')
+                .attr('class','modal-section')
+                .append('h2'),
+            body = selection.append('div')
+                .attr('class', 'modal-section');
+
+        header.append('span').attr('class', 'icon big icon-pre-text big-' + data.geometry);
+        header.append('span').text(data.title);
+        body.append('h3').text('Common Values');
+
+        var table = body.append('table')
+            .attr('class', 'tags'),
+            thead = table.append('thead');
+
+        thead.append('th').text('Value');
+        thead.append('th').text('Description');
+        thead.append('th').text('Count');
+
+        var rows = table.selectAll('tr')
+            .data(data.data)
+            .enter()
+            .append('tr');
+
+        var cols = rows.selectAll('td')
+            .data(function(d, i) {
+                return [d.value, d.description || "", d.count];
+            })
+            .enter()
+            .append('td')
+            .text(String);
+    });
+};