Libraries, archives and museums have long collected physical materials and other artefacts. In so doing they have established formal or informal policies defining what they will (and will not) collect. We argue that these activities by their very nature privilege some information over others and that the appraisal that underlies this privileging is itself socially constructed. We do not cast this in a post-modernist or negative light, but regard a clear understanding of it as fact and its consequences as crucial to understanding what collections are and what the implications are for the digital world. We will argue that in the digital world it is much easier for users to
construct their own collections from a combination of resources, some privileged and curated by information professionals and some privileged by criteria that include
the frequency with which other people link to and access them. We conclude that developing these ideas is an important part of placing the concept of a digital or
hybrid paper/digital library on a firm foundation and that information professionals need to learn from each other, adopting elements of a variety of different approaches
to describing and exposing information. A failure to do this will serve to push information professional towards the margins of the information seekers perspective
