The following definitions are from the HON principles of conduct.2Authority speaks to the need that any medical or health advice provided on a WWW site should be given by a medically trained and qualified professional unless clearly designated otherwise. Complementarity indicates that information provided on a health-care site is designed to support and not replace the patient-physician relationship. Confidentiality of data relates to individual patients visiting a Web site, including their identity, which must not be disclosed. Confidentiality standards vary between states and countries, therefore the Web site must meet or exceed the confidentiality standards of the patient’s region. Attribution means that where appropriate, information contained on a Web site will be supported by clear references as to source and hyperlinks to that source. Additionally, the date when that source was last updated must be indicated (ie, timeliness of data). Justifiability specifies that any claims relating to the benefits/performance of a specific treatment, product, or service will be supported by appropriate, balanced evidence in the manner outlined under the “attribution” element of the HON code. Transparency of authorship addresses that the Web site will clearly provide information including contact information for all authors and the Webmaster of the site. Transparency of sponsorship makes obvious the identities of commercial and noncommercial organizations that have contributed funding services or materials for a site. Finally, the honesty in advertising and editorial policy element of the HON code speaks to the need to have a brief description on a medical site of the advertising and editorial policies of the site explicitly stated.