| Property Name | Description | Required? |
| content | Text content of page | Yes |
| format | MIME type of content property: text/plain or text/html | Yes |
| native_size | Size in bytes of the content | No |
| thumbnail | Small image of content | No |
| thumbnail_format | MIME type of thumbnail image image/gif, image/jpeg, or image/png | No |
| uri | The file's URI | Yes |
| last_modified_time | Date and time the file was last modified | Yes |
| title | Filename of file | No |
| author | File's author name | No |
| bookmarked | Indicates if file has been bookmarked | No |
| interaction_period | Amount of time user interacted with the web page | No |