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URL

A Schema.org Type
Data type: URL.

Instances of URL may appear as a value for the following properties
PropertyOn TypesDescription
acceptsReservations FoodEstablishment Indicates whether a FoodEstablishment accepts reservations. Values can be Boolean, an URL at which reservations can be made or (for backwards compatibility) the strings Yes or No.
acquireLicensePage CreativeWork Indicates a page documenting how licenses can be purchased or otherwise acquired, for the current item.
actionPlatform EntryPoint The high level platform(s) where the Action can be performed for the given URL. To specify a specific application or operating system instance, use actionApplication.
actionableFeedbackPolicy NewsMediaOrganization  or
Organization
For a NewsMediaOrganization or other news-related Organization, a statement about public engagement activities (for news media, the newsroom’s), including involving the public - digitally or otherwise -- in coverage decisions, reporting and activities after publication.
additionalType Thing An additional type for the item, typically used for adding more specific types from external vocabularies in microdata syntax. This is a relationship between something and a class that the thing is in. Typically the value is a URI-identified RDF class, and in this case corresponds to the use of rdf:type in RDF. Text values can be used sparingly, for cases where useful information can be added without their being an appropriate schema to reference. In the case of text values, the class label should follow the schema.org style guide.
afterMedia HowToDirection A media object representing the circumstances after performing this direction.
applicationCategory SoftwareApplication Type of software application, e.g. 'Game, Multimedia'.
applicationSubCategory SoftwareApplication Subcategory of the application, e.g. 'Arcade Game'.
archivedAt CreativeWork Indicates a page or other link involved in archival of a CreativeWork. In the case of MediaReview, the items in a MediaReviewItem may often become inaccessible, but be archived by archival, journalistic, activist, or law enforcement organizations. In such cases, the referenced page may not directly publish the content.
artMedium VisualArtwork The material used. (E.g. Oil, Watercolour, Acrylic, Linoprint, Marble, Cyanotype, Digital, Lithograph, DryPoint, Intaglio, Pastel, Woodcut, Pencil, Mixed Media, etc.)
artform VisualArtwork e.g. Painting, Drawing, Sculpture, Print, Photograph, Assemblage, Collage, etc.
artworkSurface VisualArtwork The supporting materials for the artwork, e.g. Canvas, Paper, Wood, Board, etc.
asin Demand  or
Offer  or
Product
An Amazon Standard Identification Number (ASIN) is a 10-character alphanumeric unique identifier assigned by Amazon.com and its partners for product identification within the Amazon organization (summary from Wikipedia's article).

Note also that this is a definition for how to include ASINs in Schema.org data, and not a definition of ASINs in general - see documentation from Amazon for authoritative details. ASINs are most commonly encoded as text strings, but the [asin] property supports URL/URI as potential values too.
associatedDisease BioChemEntity Disease associated to this BioChemEntity. Such disease can be a MedicalCondition or a URL. If you want to add an evidence supporting the association, please use PropertyValue.
bankAccountType BankAccount The type of a bank account.
beforeMedia HowToDirection A media object representing the circumstances before performing this direction.
benefitsSummaryUrl HealthInsurancePlan The URL that goes directly to the summary of benefits and coverage for the specific standard plan or plan variation.
bodyType Vehicle Indicates the design and body style of the vehicle (e.g. station wagon, hatchback, etc.).
category ActionAccessSpecification  or
Invoice  or
Offer  or
PhysicalActivity  or
Product  or
Recommendation  or
Service  or
SpecialAnnouncement
A category for the item. Greater signs or slashes can be used to informally indicate a category hierarchy.
childTaxon Taxon Closest child taxa of the taxon in question.
codeRepository SoftwareSourceCode Link to the repository where the un-compiled, human readable code and related code is located (SVN, GitHub, CodePlex).
colleague Person A colleague of the person.
colorSwatch Product A color swatch image, visualizing the color of a Product. Should match the textual description specified in the color property. This can be a URL or a fully described ImageObject.
competencyRequired EducationalOccupationalCredential  or
LearningResource
Knowledge, skill, ability or personal attribute that must be demonstrated by a person or other entity in order to do something such as earn an Educational Occupational Credential or understand a LearningResource.
constraintProperty ConstraintNode Indicates a property used as a constraint. For example, in the definition of a StatisticalVariable. The value is a property, either from within Schema.org or from other compatible (e.g. RDF) systems such as DataCommons.org or Wikidata.org.
contentUrl MediaObject Actual bytes of the media object, for example the image file or video file.
correction CreativeWork Indicates a correction to a CreativeWork, either via a CorrectionComment, textually or in another document.
correctionsPolicy NewsMediaOrganization  or
Organization
For an Organization (e.g. NewsMediaOrganization), a statement describing (in news media, the newsroom’s) disclosure and correction policy for errors.
courseMode CourseInstance The medium or means of delivery of the course instance or the mode of study, either as a text label (e.g. "online", "onsite" or "blended"; "synchronous" or "asynchronous"; "full-time" or "part-time") or as a URL reference to a term from a controlled vocabulary (e.g. https://ceds.ed.gov/element/001311#Asynchronous).
credentialCategory EducationalOccupationalCredential The category or type of credential being described, for example "degree”, “certificate”, “badge”, or more specific term.
discussionUrl CreativeWork A link to the page containing the comments of the CreativeWork.
diseasePreventionInfo SpecialAnnouncement Information about disease prevention.
diseaseSpreadStatistics SpecialAnnouncement Statistical information about the spread of a disease, either as WebContent, or described directly as a Dataset, or the specific Observations in the dataset. When a WebContent URL is provided, the page indicated might also contain more such markup.
diversityPolicy NewsMediaOrganization  or
Organization
Statement on diversity policy by an Organization e.g. a NewsMediaOrganization. For a NewsMediaOrganization, a statement describing the newsroom’s diversity policy on both staffing and sources, typically providing staffing data.
diversityStaffingReport NewsMediaOrganization  or
Organization
For an Organization (often but not necessarily a NewsMediaOrganization), a report on staffing diversity issues. In a news context this might be for example ASNE or RTDNA (US) reports, or self-reported.
documentation WebAPI Further documentation describing the Web API in more detail.
downloadUrl SoftwareApplication If the file can be downloaded, URL to download the binary.
duringMedia HowToDirection A media object representing the circumstances while performing this direction.
editEIDR CreativeWork An EIDR (Entertainment Identifier Registry) identifier representing a specific edit / edition for a work of film or television.

For example, the motion picture known as "Ghostbusters" whose titleEIDR is "10.5240/7EC7-228A-510A-053E-CBB8-J" has several edits, e.g. "10.5240/1F2A-E1C5-680A-14C6-E76B-I" and "10.5240/8A35-3BEE-6497-5D12-9E4F-3".

Since schema.org types like Movie and TVEpisode can be used for both works and their multiple expressions, it is possible to use titleEIDR alone (for a general description), or alongside editEIDR for a more edit-specific description.
educationalCredentialAwarded Course  or
EducationalOccupationalProgram
A description of the qualification, award, certificate, diploma or other educational credential awarded as a consequence of successful completion of this course or program.
educationalLevel CreativeWork  or
EducationEvent  or
EducationalOccupationalCredential  or
LearningResource
The level in terms of progression through an educational or training context. Examples of educational levels include 'beginner', 'intermediate' or 'advanced', and formal sets of level indicators.
educationalProgramMode EducationalOccupationalProgram Similar to courseMode, the medium or means of delivery of the program as a whole. The value may either be a text label (e.g. "online", "onsite" or "blended"; "synchronous" or "asynchronous"; "full-time" or "part-time") or a URL reference to a term from a controlled vocabulary (e.g. https://ceds.ed.gov/element/001311#Asynchronous ).
embedUrl MediaObject A URL pointing to a player for a specific video. In general, this is the information in the src element of an embed tag and should not be the same as the content of the loc tag.
encodingFormat CreativeWork  or
MediaObject
Media type typically expressed using a MIME format (see IANA site and MDN reference), e.g. application/zip for a SoftwareApplication binary, audio/mpeg for .mp3 etc.

In cases where a CreativeWork has several media type representations, encoding can be used to indicate each MediaObject alongside particular encodingFormat information.

Unregistered or niche encoding and file formats can be indicated instead via the most appropriate URL, e.g. defining Web page or a Wikipedia/Wikidata entry.
engineType EngineSpecification The type of engine or engines powering the vehicle.
ethicsPolicy NewsMediaOrganization  or
Organization
Statement about ethics policy, e.g. of a NewsMediaOrganization regarding journalistic and publishing practices, or of a Restaurant, a page describing food source policies. In the case of a NewsMediaOrganization, an ethicsPolicy is typically a statement describing the personal, organizational, and corporate standards of behavior expected by the organization.
featureList SoftwareApplication Features or modules provided by this application (and possibly required by other applications).
feesAndCommissionsSpecification FinancialProduct  or
FinancialService
Description of fees, commissions, and other terms applied either to a class of financial product, or by a financial service organization.
fileFormat CreativeWork Media type, typically MIME format (see IANA site) of the content, e.g. application/zip of a SoftwareApplication binary. In cases where a CreativeWork has several media type representations, 'encoding' can be used to indicate each MediaObject alongside particular fileFormat information. Unregistered or niche file formats can be indicated instead via the most appropriate URL, e.g. defining Web page or a Wikipedia entry.
fuelType EngineSpecification  or
Vehicle
The type of fuel suitable for the engine or engines of the vehicle. If the vehicle has only one engine, this property can be attached directly to the vehicle.
gameLocation Game  or
VideoGameSeries
Real or fictional location of the game (or part of game).
gamePlatform VideoGame  or
VideoGameSeries
The electronic systems used to play video games.
genre BroadcastChannel  or
CreativeWork  or
MusicGroup
Genre of the creative work, broadcast channel or group.
gettingTestedInfo SpecialAnnouncement Information about getting tested (for a MedicalCondition), e.g. in the context of a pandemic.
gtin Demand  or
Offer  or
Product
A Global Trade Item Number (GTIN). GTINs identify trade items, including products and services, using numeric identification codes.

The GS1 digital link specifications express GTINs as URLs (URIs, IRIs, etc.). Details including regular expression examples can be found in, Section 6 of the GS1 URI Syntax specification; see also schema.org tracking issue for schema.org-specific discussion. A correct gtin value should be a valid GTIN, which means that it should be an all-numeric string of either 8, 12, 13 or 14 digits, or a "GS1 Digital Link" URL based on such a string. The numeric component should also have a valid GS1 check digit and meet the other rules for valid GTINs. See also GS1's GTIN Summary and Wikipedia for more details. Left-padding of the gtin values is not required or encouraged. The gtin property generalizes the earlier gtin8, gtin12, gtin13, and gtin14 properties.

Note also that this is a definition for how to include GTINs in Schema.org data, and not a definition of GTINs in general - see the GS1 documentation for authoritative details.
hasMap Place A URL to a map of the place.
hasMenu FoodEstablishment Either the actual menu as a structured representation, as text, or a URL of the menu.
hasMolecularFunction BioChemEntity Molecular function performed by this BioChemEntity; please use PropertyValue if you want to include any evidence.
hasRepresentation BioChemEntity A common representation such as a protein sequence or chemical structure for this entity. For images use schema.org/image.
healthPlanMarketingUrl HealthInsurancePlan The URL that goes directly to the plan brochure for the specific standard plan or plan variation.
identifier Thing The identifier property represents any kind of identifier for any kind of Thing, such as ISBNs, GTIN codes, UUIDs etc. Schema.org provides dedicated properties for representing many of these, either as textual strings or as URL (URI) links. See background notes for more details.
image Thing An image of the item. This can be a URL or a fully described ImageObject.
inCodeSet CategoryCode A CategoryCodeSet that contains this category code.
inDefinedTermSet DefinedTerm A DefinedTermSet that contains this term.
installUrl SoftwareApplication URL at which the app may be installed, if different from the URL of the item.
isBasedOn CreativeWork A resource from which this work is derived or from which it is a modification or adaptation.
isBasedOnUrl CreativeWork A resource that was used in the creation of this resource. This term can be repeated for multiple sources. For example, http://example.com/great-multiplication-intro.html.
isInvolvedInBiologicalProcess BioChemEntity Biological process this BioChemEntity is involved in; please use PropertyValue if you want to include any evidence.
isLocatedInSubcellularLocation BioChemEntity Subcellular location where this BioChemEntity is located; please use PropertyValue if you want to include any evidence.
isPartOf CreativeWork Indicates an item or CreativeWork that this item, or CreativeWork (in some sense), is part of.
keywords CreativeWork  or
Event  or
Organization  or
Place  or
Product
Keywords or tags used to describe some item. Multiple textual entries in a keywords list are typically delimited by commas, or by repeating the property.
knowsAbout Organization  or
Person
Of a Person, and less typically of an Organization, to indicate a topic that is known about - suggesting possible expertise but not implying it. We do not distinguish skill levels here, or relate this to educational content, events, objectives or JobPosting descriptions.
labelDetails Drug Link to the drug's label details.
layoutImage FloorPlan A schematic image showing the floorplan layout.
legislationIdentifier Legislation An identifier for the legislation. This can be either a string-based identifier, like the CELEX at EU level or the NOR in France, or a web-based, URL/URI identifier, like an ELI (European Legislation Identifier) or an URN-Lex.
license CreativeWork A license document that applies to this content, typically indicated by URL.
loanType LoanOrCredit The type of a loan or credit.
logo Brand  or
Certification  or
Organization  or
Place  or
Product  or
Service
An associated logo.
mainEntityOfPage Thing Indicates a page (or other CreativeWork) for which this thing is the main entity being described. See background notes for details.
map Place A URL to a map of the place.
maps Place A URL to a map of the place.
masthead NewsMediaOrganization For a NewsMediaOrganization, a link to the masthead page or a page listing top editorial management.
material CreativeWork  or
Product
A material that something is made from, e.g. leather, wool, cotton, paper.
measurementMethod DataCatalog  or
DataDownload  or
Dataset  or
Observation  or
PropertyValue  or
StatisticalVariable
A subproperty of measurementTechnique that can be used for specifying specific methods, in particular via MeasurementMethodEnum.
measurementTechnique DataCatalog  or
DataDownload  or
Dataset  or
Observation  or
PropertyValue  or
StatisticalVariable
A technique, method or technology used in an Observation, StatisticalVariable or Dataset (or DataDownload, DataCatalog), corresponding to the method used for measuring the corresponding variable(s) (for datasets, described using variableMeasured; for Observation, a StatisticalVariable). Often but not necessarily each variableMeasured will have an explicit representation as (or mapping to) an property such as those defined in Schema.org, or other RDF vocabularies and "knowledge graphs". In that case the subproperty of variableMeasured called measuredProperty is applicable.

The measurementTechnique property helps when extra clarification is needed about how a measuredProperty was measured. This is oriented towards scientific and scholarly dataset publication but may have broader applicability; it is not intended as a full representation of measurement, but can often serve as a high level summary for dataset discovery.

For example, if variableMeasured is: molecule concentration, measurementTechnique could be: "mass spectrometry" or "nmr spectroscopy" or "colorimetry" or "immunofluorescence". If the variableMeasured is "depression rating", the measurementTechnique could be "Zung Scale" or "HAM-D" or "Beck Depression Inventory".

If there are several variableMeasured properties recorded for some given data object, use a PropertyValue for each variableMeasured and attach the corresponding measurementTechnique. The value can also be from an enumeration, organized as a MeasurementMetholdEnumeration.
meetsEmissionStandard Vehicle Indicates that the vehicle meets the respective emission standard.
memoryRequirements SoftwareApplication Minimum memory requirements.
menu FoodEstablishment Either the actual menu as a structured representation, as text, or a URL of the menu.
merchantReturnLink MerchantReturnPolicy Specifies a Web page or service by URL, for product returns.
missionCoveragePrioritiesPolicy NewsMediaOrganization For a NewsMediaOrganization, a statement on coverage priorities, including any public agenda or stance on issues.
namedPosition Role A position played, performed or filled by a person or organization, as part of an organization. For example, an athlete in a SportsTeam might play in the position named 'Quarterback'.
newsUpdatesAndGuidelines SpecialAnnouncement Indicates a page with news updates and guidelines. This could often be (but is not required to be) the main page containing SpecialAnnouncement markup on a site.
noBylinesPolicy NewsMediaOrganization For a NewsMediaOrganization or other news-related Organization, a statement explaining when authors of articles are not named in bylines.
occupationalCredentialAwarded Course  or
EducationalOccupationalProgram
A description of the qualification, award, certificate, diploma or other occupational credential awarded as a consequence of successful completion of this course or program.
originalMediaLink MediaReview Link to the page containing an original version of the content, or directly to an online copy of the original MediaObject content, e.g. video file.
ownershipFundingInfo NewsMediaOrganization  or
Organization
For an Organization (often but not necessarily a NewsMediaOrganization), a description of organizational ownership structure; funding and grants. In a news/media setting, this is with particular reference to editorial independence. Note that the funder is also available and can be used to make basic funder information machine-readable.
parentTaxon Taxon Closest parent taxon of the taxon in question.
paymentUrl Order The URL for sending a payment.
physicalRequirement JobPosting A description of the types of physical activity associated with the job. Defined terms such as those in O*net may be used, but note that there is no way to specify the level of ability as well as its nature when using a defined term.
prescribingInfo Drug Link to prescribing information for the drug.
productReturnLink ProductReturnPolicy Indicates a Web page or service by URL, for product return.
propertyID PropertyValue A commonly used identifier for the characteristic represented by the property, e.g. a manufacturer or a standard code for a property. propertyID can be (1) a prefixed string, mainly meant to be used with standards for product properties; (2) a site-specific, non-prefixed string (e.g. the primary key of the property or the vendor-specific ID of the property), or (3) a URL indicating the type of the property, either pointing to an external vocabulary, or a Web resource that describes the property (e.g. a glossary entry). Standards bodies should promote a standard prefix for the identifiers of properties from their standards.
publicTransportClosuresInfo SpecialAnnouncement Information about public transport closures.
publishingPrinciples CreativeWork  or
Organization  or
Person
The publishingPrinciples property indicates (typically via URL) a document describing the editorial principles of an Organization (or individual, e.g. a Person writing a blog) that relate to their activities as a publisher, e.g. ethics or diversity policies. When applied to a CreativeWork (e.g. NewsArticle) the principles are those of the party primarily responsible for the creation of the CreativeWork.

While such policies are most typically expressed in natural language, sometimes related information (e.g. indicating a funder) can be expressed using schema.org terminology.
quarantineGuidelines SpecialAnnouncement Guidelines about quarantine rules, e.g. in the context of a pandemic.
relatedLink WebPage A link related to this web page, for example to other related web pages.
releaseNotes SoftwareApplication Description of what changed in this version.
replyToUrl UserComments The URL at which a reply may be posted to the specified UserComment.
requirements SoftwareApplication Component dependency requirements for application. This includes runtime environments and shared libraries that are not included in the application distribution package, but required to run the application (examples: DirectX, Java or .NET runtime).
roleName Role A role played, performed or filled by a person or organization. For example, the team of creators for a comic book might fill the roles named 'inker', 'penciller', and 'letterer'; or an athlete in a SportsTeam might play in the position named 'Quarterback'.
sameAs Thing URL of a reference Web page that unambiguously indicates the item's identity. E.g. the URL of the item's Wikipedia page, Wikidata entry, or official website.
schemaVersion CreativeWork Indicates (by URL or string) a particular version of a schema used in some CreativeWork. This property was created primarily to indicate the use of a specific schema.org release, e.g. 10.0 as a simple string, or more explicitly via URL, https://schema.org/docs/releases.html#v10.0. There may be situations in which other schemas might usefully be referenced this way, e.g. http://dublincore.org/specifications/dublin-core/dces/1999-07-02/ but this has not been carefully explored in the community.
schoolClosuresInfo SpecialAnnouncement Information about school closures.
screenshot SoftwareApplication A link to a screenshot image of the app.
sdLicense CreativeWork A license document that applies to this structured data, typically indicated by URL.
season RadioSeries  or
TVSeries  or
VideoGameSeries
A season in a media series.
securityClearanceRequirement JobPosting A description of any security clearance requirements of the job.
sensoryRequirement JobPosting A description of any sensory requirements and levels necessary to function on the job, including hearing and vision. Defined terms such as those in O*net may be used, but note that there is no way to specify the level of ability as well as its nature when using a defined term.
serviceUrl ServiceChannel The website to access the service.
shippingSettingsLink OfferShippingDetails Link to a page containing ShippingRateSettings and DeliveryTimeSettings details.
significantLink WebPage One of the more significant URLs on the page. Typically, these are the non-navigation links that are clicked on the most.
significantLinks WebPage The most significant URLs on the page. Typically, these are the non-navigation links that are clicked on the most.
softwareRequirements SoftwareApplication Component dependency requirements for application. This includes runtime environments and shared libraries that are not included in the application distribution package, but required to run the application (examples: DirectX, Java or .NET runtime).
speakable Article  or
WebPage
Indicates sections of a Web page that are particularly 'speakable' in the sense of being highlighted as being especially appropriate for text-to-speech conversion. Other sections of a page may also be usefully spoken in particular circumstances; the 'speakable' property serves to indicate the parts most likely to be generally useful for speech.

The speakable property can be repeated an arbitrary number of times, with three kinds of possible 'content-locator' values:

1.) id-value URL references - uses id-value of an element in the page being annotated. The simplest use of speakable has (potentially relative) URL values, referencing identified sections of the document concerned.

2.) CSS Selectors - addresses content in the annotated page, e.g. via class attribute. Use the cssSelector property.

3.) XPaths - addresses content via XPaths (assuming an XML view of the content). Use the xpath property.

For more sophisticated markup of speakable sections beyond simple ID references, either CSS selectors or XPath expressions to pick out document section(s) as speakable. For this we define a supporting type, SpeakableSpecification which is defined to be a possible value of the speakable property.
sport SportsEvent  or
SportsOrganization
A type of sport (e.g. Baseball).
statType StatisticalVariable Indicates the kind of statistic represented by a StatisticalVariable, e.g. mean, count etc. The value of statType is a property, either from within Schema.org (e.g. count, median, marginOfError, maxValue, minValue) or from other compatible (e.g. RDF) systems such as DataCommons.org or Wikidata.org.
storageRequirements SoftwareApplication Storage requirements (free space required).
surface VisualArtwork A material used as a surface in some artwork, e.g. Canvas, Paper, Wood, Board, etc.
target Action Indicates a target EntryPoint, or url, for an Action.
targetUrl AlignmentObject The URL of a node in an established educational framework.
taxonRank Taxon The taxonomic rank of this taxon given preferably as a URI from a controlled vocabulary – typically the ranks from TDWG TaxonRank ontology or equivalent Wikidata URIs.
taxonomicRange BioChemEntity The taxonomic grouping of the organism that expresses, encodes, or in some way related to the BioChemEntity.
temporalCoverage CreativeWork The temporalCoverage of a CreativeWork indicates the period that the content applies to, i.e. that it describes, either as a DateTime or as a textual string indicating a time period in ISO 8601 time interval format. In the case of a Dataset it will typically indicate the relevant time period in a precise notation (e.g. for a 2011 census dataset, the year 2011 would be written "2011/2012"). Other forms of content, e.g. ScholarlyArticle, Book, TVSeries or TVEpisode, may indicate their temporalCoverage in broader terms - textually or via well-known URL. Written works such as books may sometimes have precise temporal coverage too, e.g. a work set in 1939 - 1945 can be indicated in ISO 8601 interval format format via "1939/1945".

Open-ended date ranges can be written with ".." in place of the end date. For example, "2015-11/.." indicates a range beginning in November 2015 and with no specified final date. This is tentative and might be updated in future when ISO 8601 is officially updated.
termsOfService Service Human-readable terms of service documentation.
thumbnailUrl CreativeWork A thumbnail image relevant to the Thing.
ticketToken Ticket Reference to an asset (e.g., Barcode, QR code image or PDF) usable for entrance.
titleEIDR Movie  or
TVEpisode  or
TVSeason  or
TVSeries
An EIDR (Entertainment Identifier Registry) identifier representing at the most general/abstract level, a work of film or television.

For example, the motion picture known as "Ghostbusters" has a titleEIDR of "10.5240/7EC7-228A-510A-053E-CBB8-J". This title (or work) may have several variants, which EIDR calls "edits". See editEIDR.

Since schema.org types like Movie, TVEpisode, TVSeason, and TVSeries can be used for both works and their multiple expressions, it is possible to use titleEIDR alone (for a general description), or alongside editEIDR for a more edit-specific description.
tourBookingPage Accommodation  or
ApartmentComplex  or
Place
A page providing information on how to book a tour of some Place, such as an Accommodation or ApartmentComplex in a real estate setting, as well as other kinds of tours as appropriate.
trackingUrl ParcelDelivery Tracking url for the parcel delivery.
travelBans SpecialAnnouncement Information about travel bans, e.g. in the context of a pandemic.
unitCode PropertyValue  or
QuantitativeValue  or
TypeAndQuantityNode  or
UnitPriceSpecification
The unit of measurement given using the UN/CEFACT Common Code (3 characters) or a URL. Other codes than the UN/CEFACT Common Code may be used with a prefix followed by a colon.
unnamedSourcesPolicy NewsMediaOrganization  or
Organization
For an Organization (typically a NewsMediaOrganization), a statement about policy on use of unnamed sources and the decision process required.
url Thing URL of the item.
usageInfo CreativeWork The schema.org usageInfo property indicates further information about a CreativeWork. This property is applicable both to works that are freely available and to those that require payment or other transactions. It can reference additional information, e.g. community expectations on preferred linking and citation conventions, as well as purchasing details. For something that can be commercially licensed, usageInfo can provide detailed, resource-specific information about licensing options.

This property can be used alongside the license property which indicates license(s) applicable to some piece of content. The usageInfo property can provide information about other licensing options, e.g. acquiring commercial usage rights for an image that is also available under non-commercial creative commons licenses.
usesHealthPlanIdStandard HealthInsurancePlan The standard for interpreting the Plan ID. The preferred is "HIOS". See the Centers for Medicare & Medicaid Services for more details.
vehicleTransmission Vehicle The type of component used for transmitting the power from a rotating power source to the wheels or other relevant component(s) ("gearbox" for cars).
verificationFactCheckingPolicy NewsMediaOrganization Disclosure about verification and fact-checking processes for a NewsMediaOrganization or other fact-checking Organization.
warning Drug Any FDA or other warnings about the drug (text or URL).
webFeed PodcastSeries  or
SpecialAnnouncement
The URL for a feed, e.g. associated with a podcast series, blog, or series of date-stamped updates. This is usually RSS or Atom.