The .anb File Extension

Written by stephen byron cooper Google
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The .anb File Extension
Analyst's Notebook supports law enforcement. (Siri Stafford/Lifesize/Getty Images)

The ANB file extension is carried by files created by the i2 application Analyst's Notebook. The naming of file extensions has no set industry standard or enforcement body. Each software house decides which file extensions its programs will use. The main convention on file extension names is to use an acronym with of the file's contents or the producing program's name. ANB is an acronym for Analyst's Notebook.


I2 is a U.K.-based software house specialising in intelligence and investigation management systems. Its customer base is mainly in defence and law enforcement. The company's products aim at assisting law enforcement organisations monitor illegal activity and track through data to link related crimes.

Analyst's Notebook

The Analyst's Notebook application holds gathered data on crimes and illegal activities. The main engine of the system is the visualisation interface. This displays stored intelligence graphically, such as with traditional pie charts, line graphs or plotted points connecting representations of crimes or criminals. Geographic progressions of crimes show a spree moving across a map. Data can also be viewed in table format.

Social Network Analysis

Analyst's Notebook includes a facility to display the people involved in a crime and track any connections among them by drawing lines of association between various participants. These charts are offered from several viewpoints, centring the network on a particular person and describing that subject's relationship to others in the network in terms of "closeness" or "betweeness." Two other views are degree centrality, showing which subjects have the most activity in an analysed event, and eigenvector hubs, displaying the influence each subject has over others in the chart.


A chart, whether, a simple pie chart or a web of associations, is saved in a file with an ANB file extension. Analyst's Notebook only employs two file types: the ANB file and a CAS file. Files with the CAS file extension contain case-notebook time lines.

Data Sources

The charts in Analyst's Notebook are based on a collection of data. That data can be either typed in manually or imported in formatted files. The program is also able to interact with third-party systems, like CopLink, a data gathering system. Geographic representations are imported from Esri's ArcGIS, which is a geographic information system.

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