diff --git a/README.md b/README.md
index fc4713b..6df0471 100644
--- a/README.md
+++ b/README.md
@@ -32,18 +32,25 @@ A source tagging system is in the works, the preliminary version consists of add
 `#<type>:<info*>`
 
 Types can be:
+
 * `WEB`: website, info identifies the website in question
 * `SCRAPE`: scrape, info identiies the source of the scrape
 * `GAME`: game data, info identifies the data and location
 * `MAME`: MAME sources, info identifies the driver filename
 * `DOC`: official documentation, info identifies the producer and identifier of the document
+* `CLAIM`: observation or information without direct proof, e.g. picture
+* `MEDIA`: uploaded media to [media repository](https://github.com/Shizmob/arcade-docs-media), e.g. pictures of
+  cabinets, boards, model stickers, etc.
 
 Examples:
+
 * `#WEB:http://kururusky.com/?p=1458`, a website source;
 * `#SCRAPE:sega:arcade-history`, a scrape source (SEGA's [arcade history](https://sega.jp/history/arcade) page);
 * `#GAME:namco:PBN100-1-NA-MPRO-A:AMCUS/AMConfig.ini`, a game data source (`AMConfig.ini` in Pokemon Battle Network);
 * `#MAME:namcops2`: a MAME source (the `namcops2.cpp` driver comments);
 * `#DOC:konami:114946810000`, an official document source: the KONAMI beatmania IIDX 23 tricoro cabinet manual (doc #114946810000);
+* `#CLAIM:shiz`, an observation by [shiz](https://github.com/Shizmob)
+* `#MEDIA:konami/GPI36-JA-sticker.jpg`, picture of the model sticker of the Metal Gear Arcade cabinet
 
 In the meantime here are some major sources used: