Scanners do not query search engines, but rather filter webpages that do not match their criteria. For example, scanners can filter all pages that do not contain links to images or Office documents, pages that do not contain email addresses, or pages that have no embedded images. You can also use scanners to restrict search runs to Atom/RSS/JSON feeds, pages with linked documents, or to thumbnail galleries. Scanners filter out all pages that do not match.
Also, scanners are used by the sidebar of web browser windows to filter certain elements and display them lists, e.g. links, images, or news feeds.
By default, DEVONagent Pro comes with the following scanners that you can use in search sets.
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All Links: Lists all links of a page, e.g., those found by a secondary query.
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Atom, RSS & JSON Feeds: Looks for linked Atom, RSS, and JSON news feeds.
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Audio files: Looks for linked or embeddedaudio files and audio streams.
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Code: Looks for code snippets.
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Email Addresses: Looks for email addresses and recognizes even non-linked and scrambled addresses like "info at devon-technologies dot com".
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Embedded Images: Lists all images of the page, e.g., those found by a secondary query.
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Linked BibTeX & LaTeX Files: Looks for linked BibTeX and LaTeX files.
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Linked Binary Files: Looks for linked downloadable compressed archives and disk images.
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Linked Documents: Looks for linked PDF, PostScript, OpenOffice, StarOffice, WordPerfect, Microsoft Word, Microsoft PowerPoint, EPUB, Kindle, or text documents.
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Linked Scripts: Looks for linked AppleScript scripts.
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Linked Spreadsheets: Looks for linked spreadsheet files (XMLSS, Microsoft Excel, CSV, TSV).
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Linked Vcard files: Looks for linked business card files (.vcf).
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Recipies: Looks for cooking recipies.
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Thumbnail Galleries: Looks for images in an image gallery, but lets pass all pages containing (usually smaller) images linked to (usually larger) image files, a.k.a. thumbnail galleries.
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Twitter Accounts: Looks for links referencing unique Twitter IDs.
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Video Files: Looks for linked or embedded video files and streams.
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Wallpapers: Looks for desktop background pictures.
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Webcams: Looks for web cams and live streams.
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