Indicates an item or CreativeWork that this item, or CreativeWork (in some sense), is part of.

The parent of a question, answer or item in general. Typically used for Q/A discussion threads e.g. a chain of comments with the first comment being an [Article](https://schema.org/Article) or other [CreativeWork](https://schema.org/CreativeWork). See also [comment](https://schema.org/comment) which points from something to a comment about it.

A citation or reference to another creative work, such as another publication, web page, scholarly article, etc.

A creative work that this work is an example/instance/realization/derivation of.

Indicates an item or CreativeWork that is part of this item, or CreativeWork (in some sense).

A resource that was used in the creation of this resource. This term can be repeated for multiple sources. For example, http://example.com/great-multiplication-intro.html.

A license document that applies to this content, typically indicated by URL.

The publishingPrinciples property indicates (typically via [URL](https://schema.org/URL)) a document describing the editorial principles of an [Organization](https://schema.org/Organization) (or individual, e.g. a [Person](https://schema.org/Person) writing a blog) that relate to their activities as a publisher, e.g. ethics or diversity policies. When applied to a [CreativeWork](https://schema.org/CreativeWork) (e.g. [NewsArticle](https://schema.org/NewsArticle)) the principles are those of the party primarily responsible for the creation of the [CreativeWork](https://schema.org/CreativeWork). While such policies are most typically expressed in natural language, sometimes related information (e.g. indicating a [funder](https://schema.org/funder)) can be expressed using schema.org terminology.

Example/instance/realization/derivation of the concept of this creative work. E.g. the paperback edition, first edition, or e-book.

An item being offered (or demanded). The transactional nature of the offer or demand is documented using [businessFunction](https://schema.org/businessFunction), e.g. sell, lease etc. While several common expected types are listed explicitly in this definition, others can be used. Using a second type, such as Product or a subtype of Product, can clarify the nature of the offer.

The CreativeWork that captured all or part of this Event.

A work performed in some event, for example a play performed in a TheaterEvent.

The CreativeWork encoded by this media object.

A step in making the recipe, in the form of a single item (document, video, etc.) or an ordered list with HowToStep and/or HowToSection items.

Software application help.

Indicates a page (or other CreativeWork) for which this thing is the main entity being described. See [background notes](https://schema.org/docs/datamodel.html#mainEntityBackground) for details.

Specifies the CreativeWork associated with the UserComment.

Cheat codes to the game.

Links to tips, tactics, etc.

The words in the song.

A CreativeWork such as an image, video, or audio clip shared as part of this posting.

A work featured in some event, e.g. exhibited in an ExhibitionEvent. Specific subproperties are available for workPerformed (e.g. a play), or a workPresented (a Movie at a ScreeningEvent).

A resource from which this work is derived or from which it is a modification or adaptation.

A CreativeWork attached to the message.