A search function is a blunt instrument. It relies on exact string matching. If a user searches for "investment," the search engine will find every instance of the word "investment." However, it will not distinguish between a discussion on "foreign investment" and "emotional investment." It cannot synthesize information. It creates noise.
| Reading System | Support for Hyperlinked Index | User Experience | | :--- | :--- | :--- | | | Excellent (EPUB 3) | Clicking index jumps instantly. Supports back button. | | Google Play Books | Good | Supports links, but sometimes slow to reflow. | | Adobe Digital Editions | Native | Handles page-list and hyperlinks flawlessly. | | Kobo | Good | Requires the index to be in the spine; works well. | | Kindle (via Convert) | Poor | When converting EPUB to MOBI/AZW3, internal indexes often break. Warning for KDP users. | | Lithium / PocketBook | Excellent | Fully supports internal anchor jumps. | epub index
Would you like a summary of key techniques from either paper? A search function is a blunt instrument
Professional indexers often use tools like Cindex or SkyIndex, which can export to XML formats compatible with EPUB. It creates noise