Have you ever had a document with a possible 3 tiers of categorization, but at times some documents only use tier one and three?
For example: your company's IT area contains the following hierarchical structure that you want to show in a view:
Level 1 = IT
Level 2 = Infrastructure, Architecture, Application Development
Level 3 (for Infrastructure) = Relational Db, Non-Relational Db
Level 3 (for Application Development) = Lotus Tool Set, IBM Tool Set
Level 3 (within IT and not specific to a level 2) = E-Business Strategy
Level4 = names of employees for your company (this is the document level and is not categorized)
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If you were to create a traditional view, with 3 columns that categorize each of the Levels as noted above, for all the E-Business Strategy documents, as there is no level 2 related to this level, you would see a "Not Categorized" above it. To eliminate this, and to have the view appear as detailed below, use the following code in the first column of the view. This column should be categorized and sorted.
> Application Development
> Lotus Tools
> IBM Tools
> E-Business Strategy
> Relational Db
> Non-Relational Db
@If(Level3 = ""; Level1 + "\" + Level2; Level2 = ""; Level1 + "\" + Level3; Level1 + "\" + Level2 + "\" + Level3)