With the recent appearance of the World Wide Web large amounts of general information related to that contained in the EHR is available which may be used in EHR systems but which also is independently accessible. Both patients and practitioners can access these information sources but it will only be in engineered healthcare enterprise information architectures where the links will be carefully evaluated for quality, accuracy, and timeliness to the services provided by that healthcare enterprise. Even so, when accessed via a healthcare enterprise web site by a person through an open link to that site, the relevance of the information obtained must be carefully considered by the person viewing it and interpreting it without guidance by a person’s practitioner in the context of what may be in the practitioner’s EHR record for that particular patient. There are also, however, informational compendia of data that may be included in a healthcare enterprise’s information architecture that serve as conceptual building  blocks for that architecture. Each healthcare enterprise must identify those collections that are consistent with its strategic plans and that lead to achievement of that enterprises stated strategic goals. Some examples that may contribute to the EHR component in a given enterprise’s information architecture are given below: