2.2.1 [DOM Level 2 - Views] Section 1.1, Introduction
The specification states:
The interfaces found within this section are not mandatory. A DOM application may use the hasFeature(feature, version) method of the DOMImplementation interface with parameter values "Views" and "2.0" (respectively) to determine whether or not this module is supported by the implementation.
Quirks Mode, IE7 Mode, and IE8 Mode (All Versions)
The hasFeature method of the DOMImplementation interface returns
false for the "Views" module and the version strings "1.0" and "2.0."