Use basic-link with
internal-destination,
which points to an element with
id attribute
with equal value.
Source
<
fo:root xmlns:fo="
http://www.w3.org/1999/XSL/Format" >
<
fo:layout-master-set>
<
fo:simple-page-master master-name="simple">
<
fo:region-body/>
</
fo:simple-page-master>
</
fo:layout-master-set>
<
fo:page-sequence master-reference="simple">
<
fo:flow flow-name="xsl-region-body">
<
fo:block id="A">
<
fo:basic-link internal-destination="B">CLICK HERE</
fo:basic-link>
to go to block with id="B".
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa aaa
</
fo:block>
<
fo:block id="B">Block with id="B".
<
fo:basic-link internal-destination="A">CLICK HERE</
fo:basic-link>
to go to block with id="A".
</
fo:block>
</
fo:flow>
</
fo:page-sequence>
</
fo:root>