Ukkil and the concept design of the term is central to the visual arts of various Islamic communities in the Philippines.
Ukkil refers to both the act of carving or engraving and types of curvilinear designs combined in an abstract composition. These design elements and its practice is evident in most brasswares of Islamic Communities.
Source: Sakili, Abraham P. Space and Identity: Expressions in the Culture, Arts and Society of the Muslims in the Philippines. Quezon City: Asian Center, University of the Philippines- Diliman, 2003.