Hardly unique. Microsoft's (now deprecated) ASP had this. ASP.Net can also be treated like this if this is desired, although most of the time it isn't. ASP is

Hardly unique. Microsoft's (now deprecated) ASP had this. ASP.Net can also be treated like this if this is desired, although most of the time it isn't. ASP is not supported, so throw that out. And every language with template engines built for it can be treated like this; that doesn't prove anything.