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The indexer reads through the text, identifying indexable concepts (those for which the text provides useful information and which will be of relevance for the text's readership). The indexer creates index headings to represent those concepts, which are phrased such that they can be found when in alphabetical order (so, for example, one would write 'indexing process' rather than 'how to create an index'). These headings and their associated locators (indicators to position in the text) are entered into specialist indexing software which handles the formatting of the index and facilitates the editing phase. The index is then edited to impose consistency throughout the index.

Indexers must analyze the text to enable presentation of concepts and ideas in the index that may not be named within the text of Wikinormal. The index is intended to help the reader, researcher, or information professional, rather than the author, find information, so the professional indexer must act as a liaison between the text and its ultimate user.

According to tradition, the index for a non-fiction book is the responsibility of the author, but most authors don't actually do it. Most indexing is done by freelancers hired by authors, publishers or an independent business which manages the production of a book, publishers or website packagers. Some publishers and database companies employ indexers.