Hello Mr. Peter Jodeleit,
Thanks for your kind reply...
Still i am facing the absolute path in FS5.
To diffferentate portal page or standalone page,
$CMS_SET(contextPage, "")$
$CMS_IF(setIsPortal)$
$-- determine, if page is in portal context --$
$CMS_SET(contextPage)$$CMS_VALUE(psProjectUri,default:"")$$CMS_END_SET$
$CMS_ELSE$
$-- determine, if page is in standalone --$
$CMS_SET(contextPage)$$CMS_VALUE(ps_standaloneHost,default:"")$$CMS_END_SET$
$CMS_END_IF$
For Link Template,
$CMS_IF("lt_overlaylink_internal".equals(ltSelectedName.toString()))$
$--This condition belongs to internal link--$
<atom:link rel="detail" href="$CMS_TRIM(level:4)$$CMS_VALUE(contextPage)$$CMS_REF(content.external_link,abs:2)$$CMS_END_TRIM$"/>
$CMS_ELSIF("lt_overlaylink_media".equals(ltSelectedName.toString()))$
$--This condition belongs to media link--$
$CMS_SET(link, "")$
$CMS_SET(extMediaLink)$$CMS_VALUE(content.external_link,default:"")$$CMS_END_SET$
$CMS_IF(isSet(ss_portal_integration) && ss_portal_integration.equals("true"))$
$CMS_SET(portalLink)$$CMS_VALUE(psBNNProjectUri,default:"")$$CMS_END_SET$
$CMS_SET(link)$$CMS_VALUE(portalLink)$$CMS_VALUE(extMediaLink)$$CMS_END_SET$
$CMS_ELSE$
$CMS_SET(standaloneLink)$$CMS_VALUE(ps_standaloneHost,default:"")$$CMS_END_SET$
$CMS_SET(link)$$CMS_VALUE(standaloneLink)$$CMS_VALUE(extMediaLink)$$CMS_END_SET$
$CMS_END_IF$
<atom:link rel="detail" href="$CMS_TRIM(level:4)$$CMS_VALUE(contextPage)$$CMS_REF(content.external_link,abs:2)$$CMS_END_TRIM$"/>
result is like below,
<atom:link rel="detail" href="http://data.com ......ABS path is empty for the LINK(selected value)" />

Absolute path is empty for the link even if i selected it...?Why this behaviour?
Thanks,
Siva