Website hierarchy is a central principle for organizing information in websites with implications for user orientation on the Web. Employing websites for children as case studies, this paper proposes a conceptualization of website hierarchy developed by adapting a tool from systemic functional linguistics to the analysis of websites. This new conceptualization draws on the strengths and reconciles the differences of existing ones in order to reflect the fluidity of websites as hypermedia texts on the WWW and the role that the interaction between content organization, webpage and navigation design plays in revealing a website's hierarchical organization and thereby orienting users within it.