So far as I am aware, HotS SC2 client doesn't add much in the way of features (even the physics appear to consist of more physics-enabled model assets and data-based support), so it should be available to WoL users.
As for how, where and what, data references are one of many markup tags supported by the text type, and it should display correctly in any text display frame that doesn't strip or ignore markup; if you skim the tooltip text entries for standard Abilities, you'll see a number of other data reference tags used to display damage and duration, so its use is fairly common. Regarding applications, if one wanted to display the clan-tag text in a leaderboard, Label dialog control, or custom layout frame, one would simply replace the # char with the relevant player int.
So far as I am aware, HotS SC2 client doesn't add much in the way of features (even the physics appear to consist of more physics-enabled model assets and data-based support), so it should be available to WoL users.
As for how, where and what, data references are one of many markup tags supported by the text type, and it should display correctly in any text display frame that doesn't strip or ignore markup; if you skim the tooltip text entries for standard Abilities, you'll see a number of other data reference tags used to display damage and duration, so its use is fairly common. Regarding applications, if one wanted to display the clan-tag text in a leaderboard, Label dialog control, or custom layout frame, one would simply replace the
#char with the relevant player int.Insert the data reference markup
<d Player="#" GameValue="PlayerClanTag"/>into text.