[xsl] multiple or statements in xsl:when

[Daniel Purucker <dpu@xxxxxxxxxxxxxxxxxx>]

Hi,
how can i get multiple or-statements inside an <xsl:when> working?
The FAQ gives an example for two or's and that works fine.

<xsl:if test="@name='John' or @name='Joe'">
  <xsl:text>Smith</xsl:text>
</xsl:if>

But using the following code doesn't work. I'd like to test if the 
element is named "void", if it has an attribute called property and if 
it has, whether the property has the value container or 
assetscontainer, and so on...

<xsl:when test="name(.)='void' and @property !='' and @property !=
'container' or
@property != 'container' or
@property != 'assetscontainer' or
@property != 'incomecontainer' or
@property != 'value' or
@property != 'variable' "
</xsl:when>

Any ideas why my code doesn't work? Thanx in advance,
Daniel Purucker