One great feature of Mendix is the page-property ‘url’ which allows you to refer directly to an object like this:
Unfortunately, you can only use ‘Id’ here, which exposes the internal Mendix-object id. Both a (minor) security risk and unwanted.
Another disadvantage is that you cannot select it when sending emails since you cannot define a placeholder to show the object-id. A workaround for this is to copy the object id to another attribute of the object and use that one, but that is redundant and dirty.
This idea proposes to make it possible to use any other attribute to be used as url-parameter value:
Sidenote: Only unique attributes can be used, since you will only show one object.
Similar to the much older and planned idea: https://forum.mendix.com/link/ideas/798