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OCR Tech Allows Google to Index Millions of Scanned Documents

GoogleScanned PDFs are a kind of darknet on a web — at best search engines see an image inside a PDF, but can’t parse out the actual text. But now that’s changed as Google recently announced that it will begin using OCR (optical character recognition) technology to index the text inside scanned PDF documents.

Tip: Detect XML document encodings with SAX and XNI: Quickly find input encoding with streaming APIs

Sometimes when you forward XML documents, you just want to copy the bytes from point A to point B. You don't necessarily want to parse the entire thing, but you do need to determine the character encoding to set the metadata appropriately. In these cases, streaming APIs such as SAX and XNI offer a fast and efficient way to inspect the encoding without paying for full parsing.

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