Template context in XPath expressions - function current()

      <xsl:stylesheet
                  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                  version="2.0">
            <xsl:output  method="xml"
                        indent="yes"
                        omit-xml-declaration="yes"/>

            <xsl:template  match="/aaa">
                  <xsl:apply-templates  select="bbb"/>
            </xsl:template>

            <xsl:template  match="bbb">
                  <xxx>
                        <yyy>
                              <xsl:value-of  select="name(.),@x,position()"
                                          separator=" - "/>
                        </yyy>
                        <zzz>
                              <z1>
                                    <xsl:value-of  select="@*"
                                                separator=" | "/>
                              </z1>
                              <z2>
                                    <xsl:value-of  select="*/@*"
                                                separator=" | "/>
                              </z2>
                              <z3>
                                    <xsl:value-of  select="*/current()/@*"
                                                separator=" | "/>
                              </z3>
                        </zzz>
                  </xxx>
            </xsl:template>

      </xsl:stylesheet>

      <aaa>
            <bbb  x="000">B1</bbb>
            <bbb  x="111">B2</bbb>
            <bbb  x="222">
                  <ccc  y="555">C1</ccc>
                  <ccc  y="666">C2</ccc>
                  <ccc  y="777">C3</ccc>
            </bbb>
            <bbb  x="333">
                  <ccc  y="888">C5</ccc>
                  <ccc  y="999">C6</ccc>
            </bbb>
      </aaa>

      <xxx>
            <yyy>bbb - 000 - 1</yyy>
            <zzz>
                  <z1>000</z1>
                  <z2/>
                  <z3/>
            </zzz>
      </xxx>
      <xxx>
            <yyy>bbb - 111 - 2</yyy>
            <zzz>
                  <z1>111</z1>
                  <z2/>
                  <z3/>
            </zzz>
      </xxx>
      <xxx>
            <yyy>bbb - 222 - 3</yyy>
            <zzz>
                  <z1>222</z1>
                  <z2>555 | 666 | 777</z2>
                  <z3>222</z3>
            </zzz>
      </xxx>
      <xxx>
            <yyy>bbb - 333 - 4</yyy>
            <zzz>
                  <z1>333</z1>
                  <z2>888 | 999</z2>
                  <z3>333</z3>
            </zzz>
      </xxx>