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I2 Analyst's Notebook 7 User Guide - ISS Africa -Investigation ...

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What is vertical alignment?<br />

Appendix B: The i2 Semantic Approach<br />

The i2 Semantic Type Library structures semantic types into families of like<br />

semantic types, in a child/parent relationship. The structure of the semantic types<br />

is used to show that certain entities are related, just as they are in the real world.<br />

For example, cars, motorcycles and trucks can all be classified as vehicles,<br />

therefore the Bus, Car, Motorcycle and Truck semantic types belong to the Motor<br />

Vehicle family of semantic types.<br />

An entity that is assigned the Car semantic type is vertically aligned with an entity<br />

that is assigned the Motor Vehicle semantic type, because it is assigned a<br />

semantic type that is part of the Motor Vehicle family of semantic types. Vertical<br />

alignment is particularly useful for grouping, and searching for, similar real-world<br />

objects. For example:<br />

• The Semantic Path analysis attribute in Analyst’s <strong>Notebook</strong> uses vertical<br />

alignment to group similar real-world objects together for analysis<br />

• Queries with semantic conditions in iBase use vertical alignment to group<br />

similar real-world objects together for querying (in SQL Server databases only)<br />

Vertical alignment also applies to links and attribute classes or fields.<br />

i2 Analyst’s <strong>Notebook</strong> 7 <strong>User</strong> <strong>Guide</strong>: Customizing & Analyzing 357

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