XPath/XSLT/Axes select all siblings including self

It seems logical to me that there would be an easy axis or something else to select the text of all siblings, including self, but I can't seem to find it.

XML:

<panelTabs>
 <field></field>
 <field></field>
</panelTabs>

I'm currently in a <xsl:template match="panelTabs/field>, and I need to be in this template. I want to check whether or not all of the values within every <field> are empty, How do I do this?

Edit:

To be a little more specific. I would like my XSLT to be something like this:

<xsl:template match="panelTabs/field>
 <xsl:if test="allfieldshaventgottext = true">
  <p>All are empty</p>
 </xsl:if>
 <xsl:if test="thereisafieldwithtext = true">
  <p>There is a field with text</p>
 </xsl:if>
</xsl:template>

Instead of an xsl:if, an xsl:when will do