> For the complete documentation index, see [llms.txt](https://docs.navigaglobal.com/opencontent/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/opencontent/meta-data-standards.md).

# Meta data standards

OC Concepts is a metadata structure, built around the IPTC NewsMLG2 standard.  One of the most important parts of that is of course how to use it. For the editor, the developer as well as the end user. All concepts are stored and made available in Open Content. 

In our view, metadata like categories and tags are not just text strings. Instead, each metadata is an object – each with a unique id, name and its own set of metadata and links. 

Like an author. It could be just a name, But when you think of it as an object with a unique id, first name, last name, email, phone, description, avatar image, high res image and links things get really powerful.

These can be shown in your frontend if you want to, for example when showing articles for a specific category on a search page could then show the long description or image for that category. 

**Examples of Concepts:** 

* Author
* Category
* Persons
* Organisations
* Topics 
* Places (poI:s or geo areas)
* Story
* Functional tags

The concepts are administered using our Dashboard application, your journalists use Digital Writer to choose the right concepts, and Everyware and the App Platform will show and let the user follow selected topics or geo areas.\
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