They are used in the transliteration of cuneiform for partially preserved signs and look like the very top portions, respectively, of the parentheses marks : [ and ]
I'm hoping that they are supported in Unicode, as they are used frequently in Assyriological literature.
All help greatly appreciated,
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Paul James Cowie
London, UK and Sydney, Australia
Editor, http://www.ancientneareast.net/ Area Supervisor, Tel Rehov Excavations, Israel Committee Member, Friends of the Petrie Museum of Egyptian Archaeology
PhD Candidate, Department of Ancient History and Archaeology, Macquarie University, Sydney, Australia
