My concert videos: https://www.youtube.com/user/asteriosmusic
My concert photos: http://asterios79.rajce.idnes.cz/
My bandcamp: https://bandcamp.com/asterios79
My soundcloud: https://soundcloud.com/asterios-anagnostoudis
My photos (concerts, records, nature): https://www.instagram.com/asterios1979/

Special characters & symbols:
Kč € Sk ℗ ® © ⊗ 〄 ☺ ♀ ♂ ° ™ ℠ ★ ☆ ✴ ✱ ▽ ▼ ∆ Δ ♢ ○ ● • ◦ ∙ … № Nº ♭ ♯ „ ” ¡ ¿ $ € ¢ £ ¥ ₩ ₪ ฿ ₫ ₴ ₹ ♥ ♦ ♠ ♣ ← ↑ → ↓ ✓ ± × ÷ ~ ≈ ≠ ≤ ≥ ½ ⅓ ¼ ² ³ § ‰ ∞ Á À Ā É È Ē Ẹ/E̩ Ẹ́/É̩ Ẹ̀/È̩ Ẹ̄/Ē̩ Í Ì Ī Ȯ Ó Ò Ō Ọ/O̩ Ọ́/Ó̩ Ọ̀/Ò̩ Ọ̄/Ō̩ „O“ ‚O‘ Ú Ù Ū Ṣ/S̩ á à ā é è ē ẹ/e̩ ẹ́/é̩ ẹ̀/è̩ ẹ̄/ē̩ í ì ī ó ò ō ọ/o̩ ọ́/ó̩ ọ̀/ò̩ ọ̄/ō̩ ú ù ū ṣ/s̩ İ ā ē ī ō ū œ ç µ iƒpi

use typewriter apostrophe ( ' ) instead of a typographic apostrophe ( ’ ) or accent marks ( ` , ´ )

How To Format Text
https://www.discogs.com/help/account/text-formatting

Country
http://www.discogs.com/help/doc/submission-guidelines-release-country
"7.1.1. "Country" refers to the country of origin (the market) of the release. For small labels, they will usually be based in, and release in, the same country. Larger labels or labels with licensing deals overseas are harder, but the country should always be the place the release was sold and distributed in. For Imports, the country they are imported from is the country of release."
"7.1.2. The country is NOT where the release was manufactured. ..."
7.2.1. If you are having trouble determining the country in which a release was marketed, the following list can be of some help:
SACEM = France, SDRM = France
BIEM = International - http://www.biem.org/index.php?lang=en
SACD = France - https://en.wikipedia.org/wiki/Soci%C3%A9t%C3%A9_des_Auteurs_et_Compositeurs_Dramatiques
SGDL = France - https://en.wikipedia.org/wiki/Soci%C3%A9t%C3%A9_des_gens_de_lettres

Not On Label
Not On Label (ArtistName) -- for unofficial releases containing music by a certain artist
Not On Label (ArtistName Self-released) -- for music released specifically by an artist, as found on tours and made available via personal websites.

Multi-CD or multi-LP set
4.7.6. Sometimes individual discs in a multi-CD or multi-LP set will have their own numbers printed on them, separate from the main catalog number on the packaging. These numbers can be entered in the 'Barcode And Other Identifiers' section...

Different tray color = valid unique release?
https://www.discogs.com/forum/thread/334350

Formats List
https://www.discogs.com/help/formatslist

SID Codes
http://ifpi.org/content/library/sid-code-implementation-guide.pdf
http://www.dometek.net/code_brochure.php

SID codes (Source Identification Codes) were introduced in 1994 by the International Federation of the Phonographic Industry (IFPI) in order to help combat piracy. The mastering SID code is usually found in the matrix area/mirror band of a CD. The mould SID code is usually found in the mould/hub of a CD.
The mastering SID code identifies where the glass master for the CD was made. The mould SID code identifies where the CD was pressed.
A mastering SID code must always start with the letter 'L'. A mould SID code can start with any letter apart from "I", "O", "S" and "Q".
Though untypical, some releases may have the SID codes repeated in the matrix string itself. Rarer still, a release may sometimes have more than one mould SID code. Further details about SID codes and their implementation can be found here
A release with SID codes cannot have been released before 1994. If the date cannot be established with a citation or an adequate explanation, the date should be left blank.

SPARS codes:
https://en.wikipedia.org/wiki/SPARS_code

Common runout groove etchings - Version 5
https://www.discogs.com/forum/thread/386878

DVD/VHS

Film Classification / Rating

Freiwillige Selbstkontrolle der Filmwirtschaft
https://en.wikipedia.org/wiki/Freiwillige_Selbstkontrolle_der_Filmwirtschaft

British Board of Film Classification
https://en.wikipedia.org/wiki/British_Board_of_Film_Classification

E certificate: https://en.wikipedia.org/wiki/E_certificate

Various sources
David Bowie Discography http://www.illustrated-db-discography.nl/
Sleeves Research http://www.bigboppa.co.uk/sleeves-research
AMIGA http://www.bigboppa.co.uk/45-sleeves/DE/amiga/amig-de.htm

Different label colour:
https://www.discogs.com/forum/thread/719496
https://www.discogs.com/forum/thread/347307

Digifile
http://www.discfactory.co.uk/packaging/digifiles/
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