What is dc:subject?

Understand Dublin Core subject keywords, RDF bags, and the Amazon contains-synthetic-performer value.

Definition

dc:subject is a Dublin Core property commonly serialized as an RDF Bag containing one or more keyword values.

Example

For the stored Amazon rule, the exact value contains-synthetic-performer is added as one subject without removing existing values.

How to inspect

Media Inspector lists parsed dc:subject values and reports duplicate occurrences or conflicting XMP packets.

How this product uses it

The metadata writer escapes XML, merges the required value, prevents duplicates, and re-reads the output before reporting verification.

Limitations

Finding a keyword proves that technical signal is present. It does not determine whether the rule applies to the pictured content.