In programming languages, a declaration is a statement that defines parameters and properties of a variable or function. This variable or function is a singular piece to a larger script which itself is part of an even larger and more complex program. Most people go about their daily activities on the Internet or in a desktop application without ever learning about this variable or function; but without the variable or function having made a declaration about how it defines itself and how it will interact with the surrounding programming code, everything comes to a halt. It can set off a chain reaction of NULLs and ERRORs; cracks of confusion and uncertainty that erode a program from the ground up. In HTML structured markups, tags in angle brackets (< and >) delimit a set of data. So <Whereas> defines a data set of stories, information, and images in the project zone.