Information architecture (IA) and document architecture (DA) provide two, partly overlapping, perspectives on the creation of document structures. This article suggests how the architecture of a document can be analysed from these two perspectives. Literature on IA and DA has been examined in order to identify central ideas that are of relevance for analysing the architectures of digital documents. The article contains an overview of how IA and DA have been used and defined. The article shows how a model for analysing documents as sociotechnical artefacts can fruitfully draw on parts of the theoretical and practical complexes of IA and DA. The aspects that are identified as particularly important from IA are organisation systems, navigation, and labelling. From DA, logical structures, layout structures, content structures, and file structures are all applicable aspects. It is discussed how these various aspects may be interpreted in order to support an analysis of the organising principles of documents.