I. Introduction
Nowadays, numerous devices and objects connected to the Internet via Web protocols like HTTP and REST architecture. The boundary of the current Internet is expanding due to the Internet of Things (IoT). Devices and things connected to the Internet can access to the data and services of each other. By the advent of IoT, researches about mashing up the real world objects are gaining momentum. It is now possible to connect various sensors and devices to one another on the Web, resulting in the concept of the Web of Things (WoT). In case of sensors, if a device is made by composing two or more sensors, it is called as a complex sensor. Therefore, the need of reusable semantic models for complex sensors arises naturally.