> For the complete documentation index, see [llms.txt](https://docs.navigaglobal.com/writer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.navigaglobal.com/writer/developer-guide/infomaker-newsml/imnml-conceptitem.md).

# ConceptItem

IMNML use ConceptItems to represent metadata that themselves are entities (documents). The format of the IMNML ConceptItems comply to IPTC standard (NewsML-G2 version 2.26) but make use of extensions to represent certain data.

Below are the different types of ConceptItems supported by Infomaker (as defined by `<itemMetaExtProperty type="imext:type" value="..."/>`). Please note that a customer may use none, some and/or their own types of ConceptItems.

## x-im/category

Used for categories/subjects. [Example](/writer/developer-guide/infomaker-newsml/imnml-examples/imnml-conceptitem-category.md).

IPTC concept type: `cpnat:abstract`

*Example: News, Sport, Food.*

## x-im/topic

Used for concepts that are to be viewed as ”keywords” or ”tag” but is not a ”person”, ”organisation” or an ”event”. [Example](/writer/developer-guide/infomaker-newsml/imnml-examples/imnml-conceptitem-topic.md).

IPTC concept type: `cpnat:object`

*Example: Car, Climate, Indictment, ADHD.*

## x-im/person

Used for concepts that are ”person” tags. [Example](/writer/developer-guide/infomaker-newsml/imnml-examples/imnml-conceptitem-person.md).

IPTC concept type: `cpnat:person`

*Example: Carl Lewis, Isaac Asimov.*

## x-im/organisation

Used for concepts that are ”organisation” tags. [Example](/writer/developer-guide/infomaker-newsml/imnml-examples/imnml-conceptitem-organisation.md).

IPTC concept type: `cpnat:organisation`

*Example: EU, FIFA, UN.*

## x-im/content-profile

Concepts typically used as parameters in publication algorithms. Also called ”function tags”. [Example](/writer/developer-guide/infomaker-newsml/imnml-examples/imnml-contentprofile-category.md).

IPTC concept type: `cpnat:object`

*Example: Live, Breaking News.*

## x-im/place

Concepts used to represents geographical positions and areas. [Example (point)](/writer/developer-guide/infomaker-newsml/imnml-examples/imnml-conceptitem-place-point.md). [Example (polygon)](/writer/developer-guide/infomaker-newsml/imnml-examples/imnml-conceptitem-place-polygon.md)

IPTC concept type: cpnat:poi

*Example: Borås, County of Västra götaland, Sweden.*

## x-im/event

Concepts representing events. [Example](/writer/developer-guide/infomaker-newsml/imnml-examples/imnml-conceptitem-event.md).

IPTC concept type: `cpnat:event`

*Example: World Health Summit 2018*

## x-im/author

Concepts representing authors and photographers. [Example](/writer/developer-guide/infomaker-newsml/imnml-examples/imnml-conceptitem-author.md).

IPTC concept type: `cpnat:person`

*Example: Nils Olsson, Stina Andersson.*

## x-im/story

Concept typically used to create series of articles. [Example](/writer/developer-guide/infomaker-newsml/imnml-examples/imnml-conceptitem-story.md).

IPTC concept type: `imnat:story`

*Example: metoo, Elections USA, NHL 17/18*

## x-im/section

Concept representing organizational departments. [Example](/writer/developer-guide/infomaker-newsml/imnml-examples/imnml-conceptitem-section.md).

IPTC concept type: `cpnat:object`

*Example: Sport, Culture*

## x-im/channel

Concept defining publication channels. [Example](/writer/developer-guide/infomaker-newsml/imnml-examples/imnml-conceptitem-channel.md).

NewsML: cpnat:object

*Example: company.com, app*