SIE.Preface:1 - Meanings, identifiers, claims, carriers, and world-side referents remain distinct

Working object	Question it answers	What it does not establish by itself
term or designation	Which sign is used in one source?	one shared concept or referent
concept, type, or relation	Which meaning or classification does the source express?	that another source uses the same meaning
schema or semantic model	Which structures and constraints can be represented?	truth of the represented claims or fitness for this receiver
identifier	Which scheme-specific sign identifies under one issuer’s rules?	cross-source identity, master identity, or authoritative value
claim	What is asserted with which scope, interval, source, and uncertainty?	agreement, preference, authorization, or action
data item or carrier	Where is a representation recorded or transported?	preservation of meaning through extraction or transformation
world-side referent	Which entity or occurrence the claim is about	that two descriptions identify it at the same grain and interval