SIOC (Semantically-Interlinked Online Communities) is an ontology for describing the information in online communities. This information can be used to export information from online communities and to link them together. The scope of the application areas that SIOC can be used for includes (and is not limited to) weblogs, message boards, mailing lists and chat channels.
SIOC Core Ontology Namespace
has usergroup
Points to a Usergroup that has certain access to this Space.
reply of
Links to an Item or Post which this Item or Post is a reply to.
has scope
A resource that this Role applies to.
Thread
A container for a series of threaded discussion Posts or Items.
embeds knowledge
This links Items to embedded statements, facts and structured content.
creator of
A resource that the UserAccount is a creator of.
previous by date
Previous Item or Post in a given Container sorted by date.
follows
Indicates that one UserAccount follows another UserAccount (e.g. for microblog posts or other content item updates).
has creator
This is the UserAccount that made this resource.
next by date
Next Item or Post in a given Container sorted by date.
num items
The number of Posts (or Items) in a Forum (or a Container).
related to
Related Posts for this Post, perhaps determined implicitly from topics or references.
created at
When this was created, in ISO 8601 format.
This property is deprecated. Use dcterms:created from the Dublin Core ontology instead.
An identifier of a SIOC concept instance. For example, a user ID. Must be unique for instances of each type of SIOC concept within the same site.
space of
A resource which belongs to this data Space.
has group
This property has been renamed. Use sioc:has_usergroup instead.
Links to a previous (older) revision of this Item or Post.
earlier version
has moderator
A UserAccount that is a moderator of this Forum.
email
An electronic mail address of the UserAccount.
part of
A resource that the subject is a part of.
This property is deprecated. Use dcterms:isPartOf from the Dublin Core ontology instead.
content encoded
The encoded content of the Post, contained in CDATA areas.
This property is deprecated. Use content:encoded from the RSS 1.0 content module instead.
has host
The Site that hosts this Forum.
has function
A Role that this UserAccount has.
administrator of
A Site that the UserAccount is an administrator of.
has modifier
A UserAccount that modified this Item.
parent of
A child Container or Forum that this Container or Forum is a parent of.
moderator of
A Forum that a UserAccount is a moderator of.
has part
An resource that is a part of this subject.
This property is deprecated. Use dcterms:hasPart from the Dublin Core ontology instead.
owner of
A resource owned by a particular UserAccount, for example, a weblog or image gallery.
last item date
The date and time of the last Post (or Item) in a Forum (or a Container), in ISO 8601 format.
User
This class is deprecated. Use sioc:UserAccount from the SIOC ontology instead.
UserAccount is now preferred. This is a deprecated class for a User in an online community site.
Post
An article or message that can be posted to a Forum.
modifier of
An Item that this UserAccount has modified.
function of
A UserAccount that has this Role.
host of
A Forum that is hosted on this Site.
usergroup of
A Space that the Usergroup has access to.
first name
First (real) name of this User. Synonyms include given name or christian name.
This property is deprecated. Use foaf:name or foaf:firstName from the FOAF vocabulary instead.
name
The name of a SIOC concept instance, e.g. a username for a UserAccount, group name for a Usergroup, etc.
Site
A Site can be the location of an online community or set of communities, with UserAccounts and Usergroups creating Items in a set of Containers. It can be thought of as a web-accessible data Space.
Community
Community is a high-level concept that defines an online community and what it consists of.
num replies
The number of replies that this Item, Thread, Post, etc. has. Useful for when the reply structure is absent.
member of
A Usergroup that this UserAccount is a member of.
last reply date
The date and time of the last reply Post or Comment, which could be associated with a starter Item or Post or with a Thread, and expressed in ISO 8601 format.
container of
An Item that this Container contains.
last activity date
The date and time of the last activity associated with a SIOC concept instance, and expressed in ISO 8601 format. This could be due to a reply Post or Comment, a modification to an Item, etc.
Links to the latest revision of this Item or Post.
latest version
subscriber of
A Container that a UserAccount is subscribed to.
description
The content of the Post.
This property is deprecated. Use sioc:content or other methods (AtomOwl, content:encoded from RSS 1.0, etc.) instead.
Item
An Item is something which can be in a Container.
The discussion that is related to this Item.
has discussion
content
The content of the Item in plain text format.
Forum
A discussion area on which Posts or entries are made.
modified at
When this was modified, in ISO 8601 format.
This property is deprecated. Use dcterms:modified from the Dublin Core ontology instead.
addressed to
Refers to who (e.g. a UserAccount, e-mail address, etc.) a particular Item is addressed to.
scope of
A Role that has a scope of this resource.
has container
The Container to which this Item belongs.
has member
A UserAccount that is a member of this Usergroup.
num views
The number of times this Item, Thread, UserAccount profile, etc. has been viewed.
links to
Links extracted from hyperlinks within a SIOC concept, e.g. Post or Site.
Space
A Space is a place where data resides, e.g. on a website, desktop, fileshare, etc.
reference
Links either created explicitly or extracted implicitly on the HTML level from the Post.
avatar
An image or depiction used to represent this UserAccount.
has administrator
A UserAccount that is an administrator of this Site.
num threads
The number of Threads (AKA discussion topics) in a Forum.
next version
Links to the next revision of this Item or Post.
sibling
An Item may have a sibling or a twin that exists in a different Container, but the siblings may differ in some small way (for example, language, category, etc.). The sibling of this Item should be self-describing (that is, it should contain all available information).
subject
Keyword(s) describing subject of the Post.
This property is deprecated. Use dcterms:subject from the Dublin Core ontology for text keywords and sioc:topic if the subject can be represented by a URI instead.
attachment
The URI of a file attached to an Item.
feed
A feed (e.g. RSS, Atom, etc.) pertaining to this resource (e.g. for a Forum, Site, UserAccount, etc.).
has owner
A UserAccount that this resource is owned by.
has subscriber
A UserAccount that is subscribed to this Container.
about
Specifies that this Item is about a particular resource, e.g. a Post describing a book, hotel, etc.
account of
Refers to the foaf:Agent or foaf:Person who owns this sioc:UserAccount.
note
A note associated with this resource, for example, if it has been edited by a UserAccount.
num authors
The number of unique authors (UserAccounts and unregistered posters) who have contributed to this Item, Thread, Post, etc.
title
This is the title (subject line) of the Post. Note that for a Post within a threaded discussion that has no parents, it would detail the topic thread.
This property is deprecated. Use dcterms:title from the Dublin Core ontology instead.
last name
Last (real) name of this user. Synonyms include surname or family name.
This property is deprecated. Use foaf:name or foaf:surname from the FOAF vocabulary instead.
email sha1
An electronic mail address of the UserAccount, encoded using SHA1.
Container
An area in which content Items are contained.
has parent
A Container or Forum that this Container or Forum is a child of.
A user account in an online community site.
User Account
group of
This property has been renamed. Use sioc:usergroup_of instead.
link
A URI of a document which contains this SIOC object.
previous version
Links to the previous revision of this Item or Post.
Links to a later (newer) revision of this Item or Post.
later version
ip address
The IP address used when creating this Item. This can be associated with a creator. Some wiki articles list the IP addresses for the creator or modifiers when the usernames are absent.
Usergroup
A set of UserAccounts whose owners have a common purpose or interest. Can be used for access control purposes.
Role
A Role is a function of a UserAccount within a scope of a particular Forum, Site, etc.
has space
A data Space which this resource is a part of.
topic
A topic of interest, linking to the appropriate URI, e.g. in the Open Directory Project or of a SKOS category.
has reply
Points to an Item or Post that is a reply or response to this Item or Post.