In 2.4.x it is now possible to make a URL element in a screen dynamic.
For this purpose, some macro's are available to use in the URL field:

{HOST.CONN}, {HOST.DNS}, {HOST.ID}, {HOST.IP}, {HOST.HOST}, {HOST.NAME} and {$MACRO}

To make the use of other systems (CMDB,OOB management,CRM,etc.) within the URL element easier, I propose to allow and support the following macros as well:

{INVENTORY.ASSET.TAG}
{INVENTORY.CONTRACT.NUMBER}
{INVENTORY.OOB.IP}
{INVENTORY.SERIALNO.A}
{INVENTORY.SERIALNO.B}
{INVENTORY.TAG}
{INVENTORY.URL.A}
{INVENTORY.URL.B}
{INVENTORY.URL.C}

Other macros might be usefull to included also, perhaps {INVENTORY.SITE.ADDRESS.x}, {INVENTORY.SITE.CITY} and {INVENTORY.SITE.COUNTRY} to allow the inclusion of a Google (or OSM.org) map?