Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for table detection using text streams. One of the methods includes detecting, in a text stream and using column identification data, text for one or more cells in a table; creating, using the text for at least some of the one or more cells in the table, a data structure for the cell a) that associates two or more values from the table and b) for use by a downstream system as part of a natural language analysis process of data from the text stream; and storing, in memory, the data structure.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for detecting image document text data. One of the methods includes determining, for an image document that depicts text, whether the image document includes a digital overlay; in response to determining that the image document includes a digital overlay, determining whether the digital overlay comprises text data for the text depicted in the image document, metadata that is a different type of data than the text data, or both; and in response to determining that the digital overlay comprises at least text data: determining to skip optical character recognition of the image document; and providing, to a downstream system, a message that indicates that the image document has text data.