An RDF vocabulary for describing the basic structure and content of concept schemes such as thesauri, classification schemes, subject heading lists, taxonomies, 'folksonomies', other types of controlled vocabulary, and also concept schemes embedded in glossaries and terminologies.
SKOS Vocabulary
Participants in W3C's Semantic Web Deployment Working Group.
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
An ontology that describes tags, as used in the popular del.icio.us and Flickr systems, and allows for relationships between tags to be described.
Tag ontology
The Friend of a Friend (FOAF) RDF vocabulary, described using W3C RDF Schema and the Web Ontology Language.
has moderator
A UserAccount that is a moderator of this Forum.
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.
Usergroup
A set of UserAccounts whose owners have a common purpose or interest. Can be used for access control purposes.
has close match
skos:closeMatch is used to link two concepts that are sufficiently similar that they can be used interchangeably in some information retrieval applications. In order to avoid the possibility of "compound errors" when combining mappings across more than two concept schemes, skos:closeMatch is not declared to be a transitive property.
change note
A note about a modification to a concept.
note
A general note, for any purpose.
This property may be used directly, or as a super-property for more specific note types.
A textual geekcode for this person, see http://www.geekcode.com/geek.html
avatar
An image or depiction used to represent this UserAccount.
follows
Indicates that one UserAccount follows another UserAccount (e.g. for microblog posts or other content item updates).
reference
Links either created explicitly or extracted implicitly on the HTML level from the Post.
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.
next version
Links to the next revision of this Item or Post.
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.
has related
Relates a concept to a concept with which there is an associative semantic relationship.
skos:related is disjoint with skos:broaderTransitive
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 top concept
Relates, by convention, a concept scheme to a concept which is topmost in the broader/narrower concept hierarchies for that scheme, providing an entry point to these hierarchies.
next by date
Next Item or Post in a given Container sorted by date.
Role
A Role is a function of a UserAccount within a scope of a particular Forum, Site, etc.
Ordered Collection
An ordered collection of concepts, where both the grouping and the ordering are meaningful.
Ordered collections can be used where you would like a set of concepts to be displayed in a specific order, and optionally under a 'node label'.
A person known by this person (indicating some level of reciprocated interaction between the parties).
example
An example of the use of a concept.
email sha1
An electronic mail address of the UserAccount, encoded using SHA1.
account of
Refers to the foaf:Agent or foaf:Person who owns this sioc:UserAccount.
has exact match
skos:exactMatch is used to link two concepts, indicating a high degree of confidence that the concepts can be used interchangeably across a wide range of information retrieval applications. skos:exactMatch is a transitive property, and is a sub-property of skos:closeMatch.
skos:exactMatch is disjoint with each of the properties skos:broadMatch and skos:relatedMatch.
has administrator
A UserAccount that is an administrator of this Site.
The two tags are asserted as being related. This might be symmetric, but it certainly isn't transitive.
related tag
host of
A Forum that is hosted on this Site.
has owner
A UserAccount that this resource is owned by.
Post
An article or message that can be posted to a Forum.
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.
modified at
When this was modified, in ISO 8601 format.
This property is deprecated. Use dcterms:modified from the Dublin Core ontology instead.
has broader transitive
skos:broaderTransitive is a transitive superproperty of skos:broader.
By convention, skos:broaderTransitive is not used to make assertions. Rather, the properties can be used to draw inferences about the transitive closure of the hierarchical relation, which is useful e.g. when implementing a simple query expansion algorithm in a search application.
related to
Related Posts for this Post, perhaps determined implicitly from topics or references.
has narrower
Relates a concept to a concept that is more specific in meaning.
By convention, skos:broader is only used to assert an immediate (i.e. direct) hierarchical link between two conceptual resources.
Narrower concepts are typically rendered as children in a concept hierarchy (tree).
An organization funding a project or person.
Indicates the name (identifier) associated with this online account.
has subscriber
A UserAccount that is subscribed to this Container.
A reified class which defines an instance of a tagging by an agent of a resource with one or more tags.
tagging
Collection
A meaningful collection of concepts.
Labelled collections can be used where you would like a set of concepts to be displayed under a 'node label' in the hierarchy.
Links to a later (newer) revision of this Item or Post.
later version
Concept Scheme
A set of concepts, optionally including statements about semantic relationships between those concepts.
A concept scheme may be defined to include concepts from different sources.
Thesauri, classification schemes, subject heading lists, taxonomies, 'folksonomies', and other types of controlled vocabulary are all examples of concept schemes. Concept schemes are also embedded in glossaries and terminologies.
The name of a tag. Note that we can't relate this to skos:prefLabel because we cannot guarantee that tags have unique labels in a given conceptual scheme. Or can we? DEPRECATED 2005-05-19: redundant 'tag'.
tag name
scope note
A note that helps to clarify the meaning and/or the use of a concept.
preferred label
The preferred lexical label for a resource, in a given language.
A resource has no more than one value of skos:prefLabel per language tag, and no more than one value of skos:prefLabel without language tag.
The range of skos:prefLabel is the class of RDF plain literals.
skos:prefLabel, skos:altLabel and skos:hiddenLabel are pairwise disjoint properties.
A string expressing what the user is happy for the general public (normally) to know about their current activity.
A checksum for the DNA of some thing. Joke.
Container
An area in which content Items are contained.
attachment
The URI of a file attached to an Item.
An ontology for tags.
num authors
The number of unique authors (UserAccounts and unregistered posters) who have contributed to this Item, Thread, Post, etc.
content
The content of the Item in plain text format.
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.
A page about a topic of interest to this person.
A thing depicted in this representation.
The object plays the role of the tagger in the subject Tagging.
tagged by
Indicates an account held by this agent.
has reply
Points to an Item or Post that is a reply or response to this Item or Post.
member of
A Usergroup that this UserAccount is a member of.
has broader match
skos:broadMatch is used to state a hierarchical mapping link between two conceptual resources in different concept schemes.
has member
Relates a collection to one of its members.
The name of a tag. Note that we can't relate this to skos:prefLabel because we cannot guarantee that tags have unique labels in a given conceptual scheme. Or can we?
A Myers Briggs (MBTI) personality classification.
embeds knowledge
This links Items to embedded statements, facts and structured content.
A homepage of a school attended by the person.
has host
The Site that hosts this Forum.
has narrower match
skos:narrowMatch is used to state a hierarchical mapping link between two conceptual resources in different concept schemes.
Indicates that the subject tag applies to the object resource. This does not assert by who, when, or why the tagging occurred. For that information, use a reified Tagging resource.
is tag of
email
An electronic mail address of the UserAccount.
previous version
Links to the previous revision of this Item or Post.
has narrower transitive
skos:narrowerTransitive is a transitive superproperty of skos:narrower.
By convention, skos:narrowerTransitive is not used to make assertions. Rather, the properties can be used to draw inferences about the transitive closure of the hierarchical relation, which is useful e.g. when implementing a simple query expansion algorithm in a search application.
has modifier
A UserAccount that modified this Item.
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.
feed
A feed (e.g. RSS, Atom, etc.) pertaining to this resource (e.g. for a Forum, Site, UserAccount, etc.).
alternative label
An alternative lexical label for a resource.
Acronyms, abbreviations, spelling variants, and irregular plural/singular forms may be included among the alternative labels for a concept. Mis-spelled terms are normally included as hidden labels (see skos:hiddenLabel).
The range of skos:altLabel is the class of RDF plain literals.
A project (a collective endeavour of some kind).
Concept
An idea or notion; a unit of thought.
hidden label
A lexical label for a resource that should be hidden when generating visual displays of the resource, but should still be accessible to free text search operations.
The range of skos:hiddenLabel is the class of RDF plain literals.
A weblog of some thing (whether person, group, company etc.).
Space
A Space is a place where data resides, e.g. on a website, desktop, fileshare, etc.
function of
A UserAccount that has this Role.
has function
A Role that this UserAccount has.
Links to a previous (older) revision of this Item or Post.
earlier version
A phone, specified using fully qualified tel: URI scheme (refs: http://www.w3.org/Addressing/schemes.html#tel).
has space
A data Space which this resource is a part of.
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.
num views
The number of times this Item, Thread, UserAccount profile, etc. has been viewed.
has part
An resource that is a part of this subject.
This property is deprecated. Use dcterms:hasPart from the Dublin Core ontology instead.
A document that this thing is the primary topic of.
A UserAccount that is a member of this Usergroup.
num replies
The number of replies that this Item, Thread, Post, etc. has. Useful for when the reply structure is absent.
topic
A topic of interest, linking to the appropriate URI, e.g. in the Open Directory Project or of a SKOS category.
The relationship between a resource and a Tagging. Note, of course, that this allows us to tag tags and taggings themselves...
tag
scope of
A Role that has a scope of this resource.
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).
creator of
A resource that the UserAccount is a creator of.
The gender of this Agent (typically but not necessarily 'male' or 'female').
Links to the latest revision of this Item or Post.
latest version
A user account in an online community site.
User Account
The two tags are asserted to be equivalent --- that is, that whenever one is associated with a resource, the other tag can be logically inferred to also be associated. Be very careful with this. I'm not sure if this should be a subproperty of owl:sameAs.
equivalent tag
links to
Links extracted from hyperlinks within a SIOC concept, e.g. Post or Site.
Indicates that the subject has been tagged with the object tag. This does not assert by who, when, or why the tagging occurred. For that information, use a reified Tagging resource.
tagged with tag
A workplace homepage of some person; the homepage of an organization they work for.
reply of
Links to an Item or Post which this Item or Post is a reply to.
The subject Tagging occurred at the subject time and date.
tagged on
Forum
A discussion area on which Posts or entries are made.
A personal mailbox, ie. an Internet mailbox associated with exactly one owner, the first owner of this mailbox. This is a 'static inverse functional property', in that there is (across time and change) at most one individual that ever has any particular value for foaf:mbox.
addressed to
Refers to who (e.g. a UserAccount, e-mail address, etc.) a particular Item is addressed to.
Thread
A container for a series of threaded discussion Posts or Items.
about
Specifies that this Item is about a particular resource, e.g. a Post describing a book, hotel, etc.
is in scheme
Relates a resource (for example a concept) to a concept scheme in which it is included.
A concept may be a member of more than one concept scheme.
The underlying or 'focal' entity associated with some SKOS-described concept.
The object is a Tag which plays a role in the subject Tagging.
Community
Community is a high-level concept that defines an online community and what it consists of.
Aplan comment, in the tradition of finger and '.plan' files.
Indicates the class of individuals that are a member of a Group
has parent
A Container or Forum that this Container or Forum is a child of.
owner of
A resource owned by a particular UserAccount, for example, a weblog or image gallery.
An agent (eg. person, group, software or physical artifact).
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.
A foaf:LabelProperty is any RDF property with texual values that serve as labels.
The birthday of this Agent, represented in mm-dd string form, eg. '12-31'.
definition
A statement or formal explanation of the meaning of a concept.
modifier of
An Item that this UserAccount has modified.
Item
An Item is something which can be in a Container.
has scope
A resource that this Role applies to.
parent of
A child Container or Forum that this Container or Forum is a parent of.
The sha1sum of the URI of an Internet mailbox associated with exactly one owner, the first owner of the mailbox.
administrator of
A Site that the UserAccount is an administrator of.
has container
The Container to which this Item belongs.
A note associated with this resource, for example, if it has been edited by a UserAccount.
history note
A note about the past state/use/meaning of a concept.
link
A URI of a document which contains this SIOC object.
A short informal nickname characterising an agent (includes login identifiers, IRC and other chat nicknames).
notation
A notation, also known as classification code, is a string of characters such as "T58.5" or "303.4833" used to uniquely identify a concept within the scope of a given concept scheme.
By convention, skos:notation is used with a typed literal in the object position of the triple.
part of
A resource that the subject is a part of.
This property is deprecated. Use dcterms:isPartOf from the Dublin Core ontology instead.
A link to the publications of this person.
An image that can be used to represent some thing (ie. those depictions which are particularly representative of something, eg. one's photo on a homepage).
A work info homepage of some person; a page about their work for some organization.
has group
This property has been renamed. Use sioc:has_usergroup instead.
num threads
The number of Threads (AKA discussion topics) in a Forum.
name
The name of a SIOC concept instance, e.g. a username for a UserAccount, group name for a Usergroup, etc.
usergroup of
A Space that the Usergroup has access to.
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.
is in semantic relation with
Links a concept to a concept related by meaning.
This property should not be used directly, but as a super-property for all properties denoting a relationship of meaning between concepts.
Tag
A natural-language concept which is used to annotate another resource.
The primary topic of some page or document.
A location that something is based near, for some broadly human notion of near.
has member list
Relates an ordered collection to the RDF list containing its members.
For any resource, every item in the list given as the value of the skos:memberList property is also a value of the skos:member property.
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.
Indicates a homepage of the service provide for this online account.
The discussion that is related to this Item.
has discussion
created at
When this was created, in ISO 8601 format.
This property is deprecated. Use dcterms:created from the Dublin Core ontology instead.
is top concept in scheme
Relates a concept to the concept scheme that it is a top level concept of.
space of
A resource which belongs to this data Space.
group of
This property has been renamed. Use sioc:usergroup_of instead.
has related match
skos:relatedMatch is used to state an associative mapping link between two conceptual resources in different concept schemes.
subscriber of
A Container that a UserAccount is subscribed to.
The object is a resource which plays a role in the subject Tagging.
tagged resource
num items
The number of Posts (or Items) in a Forum (or a Container).
has broader
Relates a concept to a concept that is more general in meaning.
Broader concepts are typically rendered as parents in a concept hierarchy (tree).
previous by date
Previous Item or Post in a given Container sorted by date.
moderator of
A Forum that a UserAccount is a moderator of.
last item date
The date and time of the last Post (or Item) in a Forum (or a Container), in ISO 8601 format.
has usergroup
Points to a Usergroup that has certain access to this Space.
container of
An Item that this Container contains.
is in mapping relation with
Relates two concepts coming, by convention, from different schemes, and that have comparable meanings
These concept mapping relations mirror semantic relations, and the data model defined below is similar (with the exception of skos:exactMatch) to the data model defined for semantic relations. A distinct vocabulary is provided for concept mapping relations, to provide a convenient way to differentiate links within a concept scheme from links between concept schemes. However, this pattern of usage is not a formal requirement of the SKOS data model, and relies on informal definitions of best practice.
editorial note
A note for an editor, translator or maintainer of the vocabulary.
has creator
This is the UserAccount that made this resource.
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.
A tipjar document for this agent, describing means for payment and reward.
A Tagging which has precisely one associated resource, and one associated tag.
restricted tagging
A project this person has previously worked on.