The XHTML Role Attribute defined in this specification allows the author to annotate XML Languages with machine-extractable semantic information about the purpose of an element. Use cases include accessibility, device adaptation, server-side processing, and complex data description. This attribute can be integrated into any markup language based upon XHTML Modularization
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Publisher W3C
Series W3C technical reports
Birbeck, M, Pemberton, S, & CWI et al, not. (2008). XHTML Role Attribute, A module to support role classification of elements. W3C technical reports. W3C.