diff --git a/website/docs/artist_concepts.md b/website/docs/artist_concepts.md
index 9005cffe87..f67ab89b9c 100644
--- a/website/docs/artist_concepts.md
+++ b/website/docs/artist_concepts.md
@@ -10,6 +10,8 @@ sidebar_label: Key Concepts
 
 In our pipeline all the main entities the project is made from are internally considered *'Assets'*. Episode, sequence, shot, character, prop, etc. All of these behave identically in the pipeline. Asset names need to be absolutely unique within the project because they are their key identifier.
 
+OpenPype has limitation regarging duplicated names. Name of assets must be unique across whole project.
+
 ### Subset
 
 Usually, an asset needs to be created in multiple *'flavours'*. A character might have multiple different looks, model needs to be published in different resolutions, a standard animation rig might not be usable in a crowd system and so on. 'Subsets' are here to accommodate all this variety that might be needed within a single asset. A model might have subset: *'main'*, *'proxy'*, *'sculpt'*, while data of *'look'* family could have subsets *'main'*, *'dirty'*, *'damaged'*. Subsets have some recommendations for their names, but ultimately it's up to the artist to use them for separation of publishes when needed.
@@ -24,6 +26,11 @@ A numbered iteration of a given subset. Each version contains at least one [repr
 
 Each published variant can come out of the software in multiple representations. All of them hold exactly the same data, but in different formats. A model, for example, might be saved as `.OBJ`, Alembic, Maya geometry or as all of them, to be ready for pickup in any other applications supporting these formats.
 
+
+#### Naming convention
+
+At this moment names of assets, tasks, subsets or representations can contain only letters, numbers and underscore.
+
 ### Family
 
 Each published [subset][3b89d8e0] can have exactly one family assigned to it. Family determines the type of data that the subset holds. Family doesn't dictate the file type, but can enforce certain technical specifications. For example OpenPype default configuration expects `model` family to only contain geometry without any shaders or joints when it is published.