Question

What is the LFT file?

Updated February 3, 2014

asked on February 3, 2014

When looking at the administrative console there are .lft files. What are they? Also, where are the metadata stored when using QuickFields zonal OCR? We'd like to re-purpose the metadata after capturing in a SQL database.

Thanks.

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Answer

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replied on February 3, 2014

I'm not sure where in the administration console you're seeing .lft files, but if you're talking about the ones you see in the LF volumes along with your text and image files, those are the images for the page thumbnails displayed in the LF Client.

Quick Fields stores the data read from the image in temporary files in C:\ProgramData\Laserfiche\Quick Fields\Files\<session ID>. These files are not specific to a process, they have all the information pertaining to a document. These files are deleted from disk as the documents are sent to Laserfiche.

You can use the Zone OCR data as tokens in the Lookup process to insert it into SQL.

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Replies

replied on February 3, 2014

Here's a decent KB article describing LFT files: https://support.laserfiche.com/KB/1012703

Thumbnails are used by Laserfiche clients to show a reduced-size version of pages, often to help users with file recognition and organization. Thumbnail files (which have an .lft extension) are created at the time they are needed for the first time (e.g., when a document is opened in the Laserfiche Client and the Thumbnails Pane is visible). By default, thumbnail files are stored in the document's volume. If, however, the volume is set to read-only, thumbnail files cannot be stored in the volume, and will instead be stored in memory on the Client's machine. To increase the speed at which thumbnails can be displayed, we recommend storing thumbnail files in the volume.

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What is the LFT file?

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