• File Name
• URL
• Download Link
• Thumbnail Link
• Inline Thumbnail image
• etc...

To access the table, go to Admin > Developer Links > Schema Browser and open the query ext.Data, or add a Query web part that exposes the query exp.Data.

To create a grid that shows the metadata columns, do one of the following:

• Create a custom view of the grid exp.Data, and expose the custom view by adding a Query web part.
• Or
• Create a custom query using exp.Data as the base query, and add the columns using SQL. For example, the following SQL query adds the columns InlineThumbnail and DownloadLink to the base query:

SELECT Data.Name,
Data.Run,
Data.DataFileUrl,
Data.InlineThumbnail,
Data.DownloadLink
FROM Data

Pulling Metadata from File Paths

You can pull out more metadata, if you conform to a path naming pattern. In the following example, CT and PET scans have been arranged in the following folder pattern:

scans
├───patient1
│   ├───CT
│   └───PET
└───patient2
    ├───CT
    └───PET

The following SQL query harvests out the patient id and the scan type from the directory structure above.

SELECT Data.Name as ScanName,
Data.DataFileUrl,
split_part(DataFileUrl, '/', 8) as Ptid,
split_part(DataFileUrl, '/', 9) as ScanType
FROM Data
WHERE locate('/@files/scans', DataFileUrl) > 0

The result is a table of enhanced metadata about the files, which provides new columns you can filter on, to narrow down to the files of interest.

Related Topics

• Linking Assays with Images and Other Files