This paper describes personalization metadata standards that can be used to enable individuals to access and use resources based on a user's particular requirements. The paper describes two approaches which are being developed in the library and Web worlds and highlights some of the potential challenges which will need to be addressed in order to maximise interoperability. The paper concludes by arguing the need for greater dialogue across these two communities. Categories and Subject Descriptors H5.2 [Information Interfaces and Presentation]: User Interfaces Standardization K4.2 [Computers and Society]: Social Issues ? Assistive technologies for persons with disabilities General Terms Human Factors, Standardization Keywords Metadata, accessibility, IMS, MARC.