| CSS |
| Extension |
| Extension | A Extension is a tool that extends the capabilities of a Query object. |
| Query |
| DOMQuery | The DOMQuery object is the primary tool in this library. |
| Entities | Perform various tasks on HTML/XML entities. |
| Exception | Exception indicating that a problem has occured inside of a QueryPath object. |
| ExtensionRegistry | A registry for QueryPath extensions. |
| IOException | Indicates that an input/output exception has occurred. |
| Options | Manage default options. |
| ParseException | Exception indicating that a parser has failed to parse a file. |
| QueryPathIterator | An iterator for QueryPath. |