about

Specifies that this Item is about a particular resource, e.g. a Post describing a book, hotel, etc.

• ObjectProperty

account of

Refers to the foaf:Agent or foaf:Person who owns this sioc:UserAccount.

• ObjectProperty

addressed to

Refers to who (e.g. a UserAccount, e-mail address, etc.) a particular Item is addressed to.

• ObjectProperty

administrator of

A Site that the UserAccount is an administrator of.

• ObjectProperty

attachment

The URI of a file attached to an Item.

• ObjectProperty

avatar

An image or depiction used to represent this UserAccount.

• ObjectProperty

Community

Community is a high-level concept that defines an online community and what it consists of.

• Class

Container

An area in which content Items are contained.

• Class

container of

An Item that this Container contains.

• ObjectProperty

content

The content of the Item in plain text format.

• DatatypeProperty

content encoded

The encoded content of the Post, contained in CDATA areas.

• DatatypeProperty
• DeprecatedProperty

created at

When this was created, in ISO 8601 format.

• DatatypeProperty
• DeprecatedProperty

creator of

A resource that the UserAccount is a creator of.

• ObjectProperty

description

The content of the Post.

• DatatypeProperty
• DeprecatedProperty

earlier version

Links to a previous (older) revision of this Item or Post.

• TransitiveProperty

email

An electronic mail address of the UserAccount.

• ObjectProperty

email sha1

An electronic mail address of the UserAccount, encoded using SHA1.

• DatatypeProperty

embeds knowledge

This links Items to embedded statements, facts and structured content.

• ObjectProperty

feed

A feed (e.g. RSS, Atom, etc.) pertaining to this resource (e.g. for a Forum, Site, UserAccount, etc.).

• ObjectProperty

first name

First (real) name of this User. Synonyms include given name or christian name.

• DatatypeProperty
• DeprecatedProperty

follows

Indicates that one UserAccount follows another UserAccount (e.g. for microblog posts or other content item updates).

• ObjectProperty

Forum

A discussion area on which Posts or entries are made.

• Class

function of

A UserAccount that has this Role.

• ObjectProperty

group of

• DeprecatedProperty
• ObjectProperty

has administrator

A UserAccount that is an administrator of this Site.

• ObjectProperty

has container

The Container to which this Item belongs.

• ObjectProperty

has creator

This is the UserAccount that made this resource.

• ObjectProperty

has discussion

The discussion that is related to this Item.

• ObjectProperty

has function

A Role that this UserAccount has.

• ObjectProperty

has group

• DeprecatedProperty
• ObjectProperty

has host

The Site that hosts this Forum.

• ObjectProperty

has member

A UserAccount that is a member of this Usergroup.

• ObjectProperty

has moderator

A UserAccount that is a moderator of this Forum.

• ObjectProperty

has modifier

A UserAccount that modified this Item.

• ObjectProperty

has owner

A UserAccount that this resource is owned by.

• ObjectProperty

has parent

A Container or Forum that this Container or Forum is a child of.

• ObjectProperty

has part

An resource that is a part of this subject.

• DeprecatedProperty
• ObjectProperty

has reply

Points to an Item or Post that is a reply or response to this Item or Post.

• ObjectProperty

has scope

A resource that this Role applies to.

• ObjectProperty

has space

A data Space which this resource is a part of.

• ObjectProperty

has subscriber

A UserAccount that is subscribed to this Container.

• ObjectProperty

has usergroup

Points to a Usergroup that has certain access to this Space.

• ObjectProperty

host of

A Forum that is hosted on this Site.

• ObjectProperty

id

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.

• DatatypeProperty

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.

• DatatypeProperty

Item

An Item is something which can be in a Container.

• Class

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.

• DatatypeProperty

last item date

The date and time of the last Post (or Item) in a Forum (or a Container), in ISO 8601 format.

• DatatypeProperty

last name

Last (real) name of this user. Synonyms include surname or family name.

• DatatypeProperty
• DeprecatedProperty

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.

• DatatypeProperty

later version

Links to a later (newer) revision of this Item or Post.

• TransitiveProperty

latest version

Links to the latest revision of this Item or Post.

• ObjectProperty

link

A URI of a document which contains this SIOC object.

• ObjectProperty

links to

Links extracted from hyperlinks within a SIOC concept, e.g. Post or Site.

• ObjectProperty

member of

A Usergroup that this UserAccount is a member of.

• ObjectProperty

moderator of

A Forum that a UserAccount is a moderator of.

• ObjectProperty

modified at

When this was modified, in ISO 8601 format.

• DatatypeProperty
• DeprecatedProperty

modifier of

An Item that this UserAccount has modified.

• ObjectProperty

name

The name of a SIOC concept instance, e.g. a username for a UserAccount, group name for a Usergroup, etc.

• DatatypeProperty

next by date

Next Item or Post in a given Container sorted by date.

• ObjectProperty

next version

Links to the next revision of this Item or Post.

• ObjectProperty

note

A note associated with this resource, for example, if it has been edited by a UserAccount.

• DatatypeProperty

num authors

The number of unique authors (UserAccounts and unregistered posters) who have contributed to this Item, Thread, Post, etc.

• DatatypeProperty

num items

The number of Posts (or Items) in a Forum (or a Container).

• DatatypeProperty

num replies

The number of replies that this Item, Thread, Post, etc. has. Useful for when the reply structure is absent.

• DatatypeProperty

num threads

The number of Threads (AKA discussion topics) in a Forum.

• DatatypeProperty

num views

The number of times this Item, Thread, UserAccount profile, etc. has been viewed.

• DatatypeProperty

owner of

A resource owned by a particular UserAccount, for example, a weblog or image gallery.

• ObjectProperty

parent of

A child Container or Forum that this Container or Forum is a parent of.

• ObjectProperty

part of

A resource that the subject is a part of.

• DeprecatedProperty
• ObjectProperty

Post

An article or message that can be posted to a Forum.

• Class

previous by date

Previous Item or Post in a given Container sorted by date.

• ObjectProperty

previous version

Links to the previous revision of this Item or Post.

• ObjectProperty

reference

Links either created explicitly or extracted implicitly on the HTML level from the Post.

• DeprecatedProperty
• ObjectProperty

related to

Related Posts for this Post, perhaps determined implicitly from topics or references.

• ObjectProperty

reply of

Links to an Item or Post which this Item or Post is a reply to.

• ObjectProperty

Role

A Role is a function of a UserAccount within a scope of a particular Forum, Site, etc.

• Class

SIOC Core Ontology Namespace

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.

• Ontology
• Thing

SIOC Core Ontology Specification

scope of

A Role that has a scope of this resource.

• ObjectProperty

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).

• SymmetricProperty

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.

• Class

Space

A Space is a place where data resides, e.g. on a website, desktop, fileshare, etc.

• Class

space of

A resource which belongs to this data Space.

• ObjectProperty

subject

Keyword(s) describing subject of the Post.

• DatatypeProperty
• DeprecatedProperty

subscriber of

A Container that a UserAccount is subscribed to.

• ObjectProperty

Thread

A container for a series of threaded discussion Posts or Items.

• Class

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.

• DatatypeProperty
• DeprecatedProperty

topic

A topic of interest, linking to the appropriate URI, e.g. in the Open Directory Project or of a SKOS category.

• ObjectProperty

User

UserAccount is now preferred. This is a deprecated class for a User in an online community site.

• DeprecatedClass

User account

A user account in an online community site.

• Class

Usergroup

A set of UserAccounts whose owners have a common purpose or interest. Can be used for access control purposes.

• Class

usergroup of

A Space that the Usergroup has access to.

• ObjectProperty