Automatically produce see also hatnote for geological categories that links to categories for adjacent time spans.

For test cases, see {{Geological category see also/testcases}}

Usage

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{{#invoke:Geological time|seeAlso}} is the standard usage.

{{#invoke:Geological time|seeAlso|article_title}} performs a test for any article title. For example:

{{#invoke:Geological time|seeAlso|Category:Jurassic animals}}

Two specialized entry points for finding time spans before and after the argument:

{{#invoke:Geological time|before|Jurassic}} → Triassic

{{#invoke:Geological time|after|Triassic}} → Jurassic