add support for http://www.w3.org/2005/xpath-functions/map

[yagee-de]

Example:

<xsl:variable name="emptyValueTest" select="map{'access':(), 'area':(), 'city':(),
        'citySection':(), 'continent':(), 'country':(), 'county':(), 'extraTerrestrialArea':(),
        'geographic':(), 'geographicCode':(), 'hierarchicalGeographic':(), 'island':(),
        'region':(), 'state':(), 'territory':()}"/>
<xsl:sequence select="map:contains($emptyValueTest, fn:local-name($node)) />