Document analysis of PDF files: methods, results and implications

A strategy for document analysis is presented which uses Portable Document Format (PDF the underlying file structure for Adobe Acrobat software) as its starting point. This strategy examines the appearance and geometric position of text and image blocks distributed over an entire document. A blackboard system is used to tag the blocks as a first stage in deducing the fundamental relationships existing between them. PDF is shown to be a useful intermediate stage in the bottom-up analysis of document structure. Its information on line spacing and font usage gives important clues in bridging the semantic gap between the scanned bitmap page and its fully analysed, block-structured form. Analysis of PDF can yield not only accurate page decomposition but also sufficient document information for the later stages of structural analysis and document understanding.

Ethnicity, Social Capital and the Internet

This article explores web sites developed to express the interests and experiences of young Chinese people in Britain. Drawing on content analysis of site discussions and dialogues with site users, we argue these new communicative practices are best understood through a reworking of the social capital problematic. Firstly by recognising the irreducibility of Internet-mediated connections to the calculative instrumentalism underlying many applications of social capital theory. Secondly, by providing a more differentiated account of social capital. The interactions we explore comprise a specifically “second generation” form of social capital, cutting across the binary of bonding and bridging social capital. Thirdly judgement on the social capital consequences of Internet interactions must await a longer-term assessment of whether British Chinese institutions emerge to engage with the wider polity.