The concept of Open Bibliography in science, technology and medicine (STM) is introduced as a combination of Open Source tools, Open specifications and Open bibliographic data. An Openly searchable and navigable network of bibliographic information and associated knowledge representations, a Bibliographic Knowledge Network, across all branches of Science, Technology and Medicine, has been designed and initiated. For this large scale endeavour, the engagement and cooperation of the multiple stakeholders in STM publishing - authors, librarians, publishers and administrators - is sought. BibJSON, a simple structured text data format (informed by BibTex, Dublin Core, PRISM and JSON) suitable for both serialisation and storage of large quantities of bibliographic data is presented. BibJSON, and companion bibliographic software systems BibServer and OpenBiblio promote the quantity and quality of Openly available bibliographic data, and encourage the development of improved algorithms and services for processing the wealth of information and knowledge embedded in bibliographic data across all fields of scholarship. Major providers of bibliographic information have joined in promoting the concept of Open Bibliography and in working together to create prototype nodes for the Bibliographic Knowledge Network. These contributions include large-scale content from PubMed and ArXiv, data available from Open Access publishers, and bibliographic collections generated by the members of the project. The concept of a distributed bibliography (BibSoup) is explored.