Currently the trend in digital publishing of Humanities data seems to be moving towards openness and interoperability. In this abstract I will examine to what extent and in what way current digital publications are open and accessible. My hypothesis is that while many digital publications are currently made available online and can be searched and viewed by the general public, very few are available to researchers in a meaningful way. By meaningful I mean that external researchers can search and export data for reuse and are possibly even encouraged to define their own search criteria. I believe that this is the true essence of data sharing. Following this, I will propose one approach, using XML and Web Services, to creating a digital publication of Humanities data that would be open to the research community in a meaningful way, as defined above.