# IBM i2 Analyst's Notebook **Entity class:** Link-analysis software platform **Domain:** Intelligence analysis / investigations / graph visualization **Aliases:** i2 Analyst's Notebook; Analyst's Notebook **Maturity:** Developed ## Definition **i2 Analyst's Notebook** is a visual intelligence-analysis environment for representing people, organizations, property, transactions, communications, and other entities as charts of typed relationships and events. It supports linked-item searches, temporal and spatial views, and social-network measures including degree, betweenness, closeness, and eigenvector centrality. The platform industrialized the manual association-matrix and link-diagram layer associated with Anacapa methods. It can reveal patterns and hidden connections, but chart appearance does not determine relationship meaning; human analysts must preserve source, edge type, confidence, and alternative explanations. IBM acquired i2 in 2011 and later divested the portfolio; the current product is operated by i2 Group. “IBM i2” remains common historical usage. ## Relationships - **implements:** [[wiki/Link Analysis|Link Analysis]] and [[wiki/Social Network Analysis|Social Network Analysis]]. - **historical predecessor:** [[wiki/Anacapa Link Analysis|Anacapa Link Analysis]]. - **data forms:** [[wiki/Association Matrix|Association Matrix]] and link diagram. - **counterterrorism use:** [[wiki/Counterterrorism Intelligence|Counterterrorism Intelligence]]. ## Sources / Provenance - [i2 Group — Analyst's Notebook](https://i2group.com/) - [IBM documentation — social network analysis in Analyst's Notebook](https://www.ibm.com/docs/en/SSJSV9_9.2.1/com.ibm.i2.anb.doc/analysts_notebook_pdf.pdf)