What are these <%$ %> asp.net markup tags called?

[Conroy94]

I was reading about how to work with SqlDataSource objects by adding properties in the markup, and for the ConnectionString property, the author used something like\[code\]<asp:SqlDataSource ... ConnectionString="<%$ ConnectionStrings:lyric %>" ... >\[/code\]The use of <%$ %> is new to me and the author didn't really explain it. I mean, I can see pretty easily what it does in this instance.But, I want to learn the syntax inside <%$ %> to access other things inside Web Config. I don't know what this type of markup is called so I can't google it. I'm having a rough time finding it.Do tags like <%@ %>, <%# %>, and <%$ %> have a special blanket name? (so I can learn other variations)Is there a specific name for <%$ %>? (so I can look it up and learn the syntax)Thanks in advance