> I have one problem. I am creating XML to PDF. I want ignore second
> imageobject 

just select the first, something like:

   <fo:block line-height="1.5"
xsl:use-attribute-sets="formal.object.properties" text-align="center">
 <fo:external-graphic src="@fileref">
  <xsl:attribute name="src">
                <xsl:apply-templates select="imagedata[@format='GIF' or
@format='JPG'][1]/@fileref"/>
              ^^^
              ^^^
              ^^^
  </xsl:attribute>

David