# Extract Custom Metadata from PDF Files

To extract custom metadata from your PDF files, add the custom metadata names to the `pdfsr.ini` file provided, and copy the modified file to the `bin` directory. You can then extract metadata as you normally would.

The `pdfsr.ini` is in the directory `samples\pdfini`, and has the following structure:

    <META>
    <TOTAL>total_item_number</TOTAL>,
    /metadata_tag_name datatype,
    </META>

Parameter | Description
--- | ---
`total_item_number` | The total number of metadata tags that are listed.
`metadata_tag_name` | The metadata tag name used in the PDF files.
`datatype` | The data type of the metadata element. The possible types are: `KV_String` `KV_Int4` `KV_DateTime` `KV_ClipBoard` `KV_Bool` `KV_Unicode` `KV_IEEE8` `KV_Other`

For example:

    <META>
    <TOTAL>4</TOTAL>
    /part_number      INT4
    /volume           INT4
    /purchase_date    DATETIME
    /customer         STRING
    </META>

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