Format
OMSS identifiers follow the format<namespace>:<value_1>:<value_2>:...:<value_n>. Values can contain any character except colons and whitespaces. If a value or namespace contains a forbidden character, it must be URI-encoded (%3A for colons and %20 for whitespaces).
Namespaces are used to differentiate between different ID-Providers and their respective identifier values. The namespace is the first part of the OMSS ID, followed by one or more values that uniquely identify the media within that namespace.