The ImmuneData team develops a data discovery index (DDI) prototype which indexes data that are stored elsewhere. The DDI plays an important role in promoting data integration through the adoption of content standards and alignment to common data elements and high-level schema.
Boolean logic is a system of showing relationships between sets by using the words "AND," "OR," and "NOT." (The term Boolean comes from the name of the man who invented this system, George Boole.) Boolean logic is recognized by many electronic searching tools as a way of defining a search string.
Example: Skin AND Cancer
Example: Lung OR Cancer
Example: Lung NOT Cancer
Terms may be qualified using ImmuneData's search field tags. The allowable fields are: title, author and description.
The search field tag must follow the term -- you cannot prequalify.
Tags are enclosed in square brackets.
Example: Lung[title] AND Cancer
Used to retrieve a set in which each dataset contains exact phrase.
The search term must be enclosed in double quotes. "AND/OR/NOT" inside double quotes are not treated as boolean logic.
Example: "Lung cancer"[title] AND Cancer