Conclusion

 

      The author of this program doesn't think possible to cover all metadata and make them editable. As said above, each producer of photo and video equipment is developing own metadata, but in practice they all adhere to EXIF 2.3 standard.

       The author will be grateful for any assistance in further improvement of this program. Images with new metadata will be especially useful to enter them  into the database. Please, contact me by e-mail  angilvv@gmail.com.