JavaScriptCollection
diff --git a/‎api/index.markdown‎
Lines changed: 9 additions & 1 deletion b/‎api/index.markdown‎
Lines changed: 9 additions & 1 deletion
@@ -59,9 +59,17 @@ interpolateObject.
 
 #### d3.select\[All\]
 
-select, selectAll, filter, data, each, empty, node, attr, classed, style,
+select, selectAll, filter, data, each, empty, node, classed, style,
 property, text, html, append, insert, remove, sort, on, transition, call.
 
+attr(name, value): Set the attribute named _name_ to _value_ on the selected 
+DOM node. _name_ is XML namespace aware. _value_ can be one of three things:
+* empty: remove the attribute
+* constant: set the attribute to the supplied value
+* function: set the attribute to the result of calling the function. The
+  function is invoked with two arguments: the bound data and the index of
+  the bound data.
+
 #### d3.transition
 
 delay, duration, ease, attrTween, attr, styleTween, style, select, selectAll,