BibLaTeX is a complete reimplementation of the bibliographic facilities provided by LaTeX. Formatting of the bibliography is entirely controlled by LaTeX macros, and a working knowledge of LaTeX should be sufficient to design new bibliography and citation styles. BibLaTeX uses its own data backend program called biber to read and process the bibliographic data. With biber, the range of features provided by BibLaTeX includes full Unicode support, customisable bibliography labels, multiple bibliographies in the same document, and subdivided bibliographies, such as bibliographies per chapter or section.