text/html
The content of the Item in plain text format.
has scope
has moderator
attachment
Specifies that this Item is about a particular resource, e.g. a Post describing a book, hotel, etc.
The name of a SIOC concept instance, e.g. a username for a UserAccount, group name for a Usergroup, etc.
earlier version
A Space that the Usergroup has access to.
A URI of a document which contains this SIOC object.
title
A Space is a place where data resides, e.g. on a website, desktop, fileshare, etc.
feed
For the reply-to address set in email messages, IMs, etc. The property name was chosen to avoid confusion with has_reply/reply_of (the reply graph).
Points to an Item or Post that is a reply or response to this Item or Post.
about
Space
disjointWith
mentions
Description
A UserAccount that modified this resource (e.g. Item, Container, Space).
link
email
depiction
The Site that hosts this Container.
An electronic mail address of the UserAccount, encoded using SHA1.
A discussion that is related to this Item. The discussion can be anything, for example, a sioc:Forum or sioc:Thread, a sioct:WikiArticle or simply a foaf:Document.
has usergroup
type
This is the UserAccount that made this resource.
seeAlso
A feed (e.g. RSS, Atom, etc.) pertaining to this resource (e.g. for a Forum, Site, UserAccount, etc.).
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.
First (real) name of this User. Synonyms include given name or christian name.
Agent
num threads
last item date
An image or depiction used to represent this UserAccount.
When this was delivered, in ISO 8601 format.
DeprecatedClass
Subject
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.
Source
versionInfo
The Item that this discussion is about.
subscriber of
num views
Turtle description of SIOC Core Ontology Namespace
email sha1
application/xhtml+xml
previous version
Site
has owner
domain
A Role that this UserAccount has.
For shared Items where there is a certain creator_of and an intermediary who shares or forwards it (e.g. as a sibling Item).
discussion of
has member
ip address
Online Account
num replies
modified at
has reply
Thing
sibling
equivalentClass
creator of
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.
A Role that has a scope of this resource.
SymmetricProperty
This property is deprecated. Use foaf:name or foaf:firstName from the FOAF vocabulary instead.
This property is deprecated. Use dcterms:title from the Dublin Core ontology instead.
A resource that the UserAccount is a creator of.
The Container to which this Item belongs.
A data Space which this resource is a part of.
content encoded
An electronic mail address of the UserAccount.
administrator of
Has Part
The number of unique authors (UserAccounts and unregistered posters) who have contributed to this Item, Thread, Post, etc.
SIOC Core Ontology Namespace
A Role is a function of a UserAccount within a scope of a particular Forum, Site, etc.
num authors
When this was created, in ISO 8601 format.
parent of
References
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.
The number of Threads (AKA discussion topics) in a Forum.
Refers to the foaf:Agent or foaf:Person who owns this sioc:UserAccount.
next version
reference
A URI for the application used to generate this Item.
first name
last reply date
shared by
Links to an Item or Post which this Item or Post is a reply to.
This property is deprecated. Use content:encoded from the RSS 1.0 content module instead.
description
The number of times this Item, Thread, UserAccount profile, etc. has been viewed.
This property is deprecated. Use dcterms:isPartOf from the Dublin Core ontology instead.
Community
HTML description of SIOC Core Ontology Namespace
function of
Container
num items
owner of
note
A resource which belongs to this data Space.
A UserAccount that is a member of this Usergroup.
An article or message that can be posted to a Forum.
delivered at
usergroup of
application/rdf+xml
A Container that a UserAccount is subscribed to.
latest version
A topic of interest, linking to the appropriate URI, e.g. in the Open Directory Project or of a SKOS category.
reply of
Links either created explicitly or extracted implicitly on the HTML level from the Post.
text/plain
An resource that is a part of this subject.
Thread
links to
Used to indicate some form of endorsement by a UserAccount or Agent of an Item, Container, Space, UserAccount, etc.
container of
Notation3 description of SIOC Core Ontology Namespace
text/n3
account
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).
name
A set of UserAccounts whose owners have a common purpose or interest. Can be used for access control purposes.
Keyword(s) describing subject of the Post.
account of
modifier of
Related resources for this resource, e.g. for Posts, perhaps determined implicitly from topics or references.
range
related to
Revision: 1.36
Links to a later (newer) revision of this Item or Post.
A UserAccount that is a moderator of this Forum.
SIOC Core Ontology Specification
RDF/XML description of SIOC Core Ontology Namespace
Role
respond to
Previous Item or Post in a given Container sorted by date.
A resource that this Role applies to.
embeds knowledge
read at
Links to the latest revision of this Item or Post.
id
generator
A Usergroup that this UserAccount is a member of.
A user account in an online community site.
space of
A resource that the subject is a part of.
A UserAccount that has this Role.
The date and time of the last Post (or Item) in a Forum (or a Container), in ISO 8601 format.
text/turtle
The IP address used when creating this Item, UserAccount, etc. 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
The number of Posts (or Items) in a Forum (or a Container).
comment
host of
This property is deprecated. Use dcterms:hasPart from the Dublin Core ontology instead.
topic
last name
A UserAccount that is subscribed to this Container.
has subscriber
Links to a previous (older) revision of this Item or Post.
A resource that this UserAccount has modified.
inverseOf
has host
This property is deprecated. Use dcterms:created from the Dublin Core ontology instead.
The URI of a file attached to an Item.
An area in which content Items are contained.
Forum
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.
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.
Literal
scope of
subject
A Forum that a UserAccount is a moderator of.
has administrator
created at
has creator
has container
The encoded content of the Post, contained in CDATA areas.
TransitiveProperty
likes
This links Items to embedded statements, facts and structured content.
subPropertyOf
Date
avatar
Refers to who (e.g. a UserAccount, e-mail address, etc.) a particular Item is addressed to.
This property is deprecated. Use dcterms:modified from the Dublin Core ontology instead.
isDefinedBy
When this was modified, in ISO 8601 format.
DatatypeProperty
UserAccount is now preferred. This is a deprecated class for a User in an online community site.
has part
User Account
has space
DeprecatedProperty
An Item is something which can be in a Container.
last activity date
A discussion area on which Posts or entries are made.
ObjectProperty
When this was read, in ISO 8601 format.
NTriples description of SIOC Core Ontology Namespace
Class
part of
subClassOf
A note associated with this resource, for example, if it has been edited by a UserAccount.
has function
User
Next Item or Post in a given Container sorted by date.
Links extracted from hyperlinks within a SIOC concept, e.g. Post or Site.
This property is deprecated. Use foaf:name or foaf:surname from the FOAF vocabulary instead.
addressed to
next by date
member of
Post
Community is a high-level concept that defines an online community and what it consists of.
Ontology
content
A UserAccount that is an administrator of this Site.
Points to a Usergroup that has certain access to this Space.
A child Container or Forum that this Container or Forum is a parent of.
Item
previous by date
label
A resource owned by a particular UserAccount, for example, a weblog or image gallery.
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.
This class is deprecated. Use sioc:UserAccount from the SIOC ontology instead.
moderator of
The content of the Post.
Document
later version
Last (real) name of this user. Synonyms include surname or family name.
A Site that the UserAccount is an administrator of.
Links to the next revision of this Item or Post.
A UserAccount that this resource is owned by.
The number of replies that this Item, Thread, Post, etc. has. Useful for when the reply structure is absent.
Refers to a UserAccount that a particular Item mentions.
An Item that this Container contains.
A container for a series of threaded discussion Posts or Items.
follows
A Container that is hosted on this Site.
Title
has discussion
This property is deprecated. Use sioc:content or other methods (AtomOwl, content:encoded from RSS 1.0, etc.) instead.
Indicates that one UserAccount follows another UserAccount (e.g. for microblog posts or other content item updates).
has modifier
A Container or Forum that this Container or Forum is a child of.
Links to the previous revision of this Item or Post.
has parent
Renamed to sioc:links_to.
Description of SIOC Core Ontology Namespace