French archaeologists had undertaken much research into rock art, Anglophone archaeology had largely neglected the subject for decades. The discipline of rock art studies witnessed what Whitley called a "revolution" during the 1980s and 1990s, as increasing numbers of archaeologists in the Anglophone world and Latin America turned their attention to the subject. In doing so, they recognised that rock art could be used to understand symbolic and religious systems, gender relations, cultural boundaries, cultural change and the origins of art and belief. One of the most significant figures in this movement was the South African archaeologist David Lewis-Williams, who published his studies of San rock art from southern Africa, in which he combined ethnographic data to reveal the original purpose of the artworks. Lewis-Williams would come to be praised for elevating rock art studies to a "theoretically sophisticated research domain" by Whitley. However, the study of rock art worldwide is marked by considerable differences of opinion with respect to the appropriateness of various methods and the most relevant and defensible theoretical framework. International databases and archives The UNESCO World Rock Art Archive Working Group met in 2011 to discuss the base model for a World Rock Art Archive. While no official output has been generated to date various projects around the world, such as for example The Global Rock Art Database, are looking at making rock art heritage information more accessible and more visible to assist with rock art awareness, conservation and preservation issues. See also List of Stone Age art Mulka's Cave The Kindness Rocks Project Notes References Bahn, Paul (ed), The Cambridge Illustrated History of Prehistoric Art, 1998, Cambridge University Press, , 9780521454735, google books Harmanşah, Ömür (ed) (2014), Of Rocks and Water: An Archaeology of Place, 2014, Oxbow Books, , 9781782976745 Rawson, Jessica (ed). The British Museum Book of Chinese Art, 2007 (2nd edn), British Museum Press, Schaafsma, Polly, 1980, Indian Rock Art of the Southwest, School of American Research, Santa Fe, University of New Mexico Press, Albuquerque NM, . Scholarly text with 349 references, 32 color plates, 283 black and white "figures", 11 maps, and 2 tables. Sickman, Laurence, in: Sickman L., & Soper A., The Art and Architecture of China, Pelican History of Art, 3rd ed 1971, Penguin (now Yale History of Art), LOC 70-125675 Further reading David, Bruno, Cave Art, 2017, Thames and Hudson, Malotki, Ekkehart and Weaver, Donald E. Jr., 2002, Stone