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AI Search Gap: Multi-Word Regular Expression Search in RadPdfProcessing #808

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YoanKar merged 2 commits into from
Sep 10, 2026
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AI Search Gap: Multi-Word Regular Expression Search in RadPdfProcessing #808

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AI Search Gap: Multi-Word Regular Expression Search in RadPdfProcessing
dessyordanova Sep 4, 2026
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YoanKar Sep 9, 2026
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12 changes: 12 additions & 0 deletions libraries/radpdfprocessing/features/search.md
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Expand Up @@ -55,6 +55,18 @@ The `TextSearchOptions` class exposes the following properties for setting the s
| `CaseSensitive` | Gets or sets a value indicating whether the search is case sensitive. |
| `WholeWordsOnly` | Gets or sets a value indicating whether only whole words are matched. |

### Regular Expression and Multi-Word Search

To search for patterns or multi-word phrases, set `UseRegularExpression = true` on `TextSearchOptions`. When using regular expressions, keep `WholeWordsOnly = false` so that internal delimiter wrappers do not conflict with your pattern.

During text extraction:
* Words on the same line are separated by a single space (`" "`).
* Line breaks within the page are normalized to a single space (`" "`) using `TextSearchOptions.TextSearchLinesSeparator`.
* Text search is evaluated per page; phrases that span across page boundaries are not matched.
* In PDF documents, spaces are determined by glyph positioning (`Delta = 1.15`). If text fragments lack sufficient visual displacement, words may be extracted contiguously.

<snippet id='regex-and-multiword-search'/>

## See Also

* [RadFixedDocument]({%slug radpdfprocessing-model-radfixeddocument%})