This document is in draft and is subject to change.
How to read this document
This document specifies data for the Educational Uses Project. It describes conceptual classes and properties, how data are expressed in Resource Descriptive Framework (RDF), and how they are persisted to a relational database. For the purposes of our implementation, data that are identical across all instances of a class are not persisted to the database. Each class has the following specifications:
- Property: A human-readable name or label for the property.
- RDF property: A recognized RDF property that can be expressed as a URI.
- DB property: How the property is persisted to a relational database. "Attribute" indicates that this property is persisted as an attribute of the described class. "Relationship" indicates that this property is persisted as a relationship to another entity in the database.
- Expected type: The expected data type for the property.
- Obligation: The number of allowable values for each property. Properties that are recommended (but not required) are indicated with a *.
- Definition: The definition of the property.
- Notes: Additional information that will help create or format data
Namespaces | |
|---|---|
| css | http://www.corestandards.org/ |
| dct | http://purl.org/dc/terms/ |
| dcmitype | http://purl.org/dc/dcmitype/ |
| ore | http://www.openarchives.org/ore/terms/ |
| ontowiki | http://ns.ontowiki.net/SysOnt/ |
| schema | http://schema.org/ |
Classes
AlignmentObject, Author, Language, Organization, Place, PrimarySource, PrimarySourceSet, Subject, TeachingGuide, TimePeriod
Class:AlignmentObject
| Property | RDF property | DB property | Expected type | Obligation | Definition | Notes |
|---|---|---|---|---|---|---|
| @type | @type | N/A | URI | 1 | RDF type of the alignment object | Expected value: "schema:AlignmentObject" |
| alignment type | schema:alignmentType | N/A | text | 1 | A category of alignment between the learning resource and the framework node. | Expected value: "requires" |
| educational framework | schema:educationalFramework | N/A | text | 1 | The framework to which the resource being described is aligned. | Format: Common Core State Standards dot notation Example: "CCSS.ELA-Literacy.RH.6-8.7" |
| target name | schema:targetName | N/A | text | 0-1* | The name of a node in an established educational framework. | Expected value: "Common Core State Standard" |
| targetUrl | schema:targetUrl | N/A | URI | 0-1* | The URL of a node in an established educational framework. | Expected values: "ccss:ELA-Literacy/RH/6-8/7/", "ccss:ELA-Literacy/RH/6-8/7/", "ccss:ELA-Literacy/RH/6-8/9/", "ccss:ELA-Literacy/RH/9-10/9/", "ccss:ELA-Literacy/RH/11-12/7/", "ccss:ELA-Literacy/RH/11-12/9/", "ccss:ELA-Literacy/CCRA/R/7/", "ccss:ELA-Literacy/CCRA/W/8/", "ccss:ELA-Literacy/WHST/6-8/8/", "ccss:ELA-Literacy/WHST/9-10/8/" |
*recommended
Class:Author
| Property | RDF property | DB property type | Expected type | Obligation | Definition | Notes |
|---|---|---|---|---|---|---|
| id | N/A | attribute | text | 1 | Unique id of the author | |
| @type | @type | N/A | URI | 1 | RDF type of the author | Expected value: "schema:Person" |
| name | schema:name | attribute | text | 1 | Name of the author | |
| affiliation | schema:affiliation | relationship | Class:Organization schema:Organization | 0-1 | Organizational affiliation of the author |
*recommended
Class:Language
| Property | RDF property | DB property | Expected type | Obligation | Definition | Notes |
|---|---|---|---|---|---|---|
| @type | @type | N/A | URI | 1 | RDF type of the language | Expected value: "schema:Language" |
| @id | @id | N/A | URI | 0-1 | RDF id of the language | Expected value: "http://www.lexvo.org/page/term/eng/English" Vocabulary: Lexvo In the future, other languages may be used, but for the time being, the only expected language is English. |
| name | schema:name | N/A | text | 0-1 | Name of the language | Expected value: "English" |
*recommended
Class:Organization
| Property | RDF property | DB property type | Expected type | Obligation | Definition | Notes |
|---|---|---|---|---|---|---|
| id | N/A | attribute | text | 1 | Unique id of the organization | |
| @type | @type | N/A | URI | 1 | RDF type of the organization | Expected value: "schema:Organization" |
| name | schema:name | attribute | text | 1 | Name of the organization | |
| location | schema:location | attribute | Class:Place schema:Place (RDF) text (DB) | 0-1 | Location of the organization | In the database, the value of this field is equivalent to Class:Place.name |
*recommended
Class:Place
| Property | RDF property | DB property | Expected type | Obligation | Definition | Notes |
|---|---|---|---|---|---|---|
| @type | @type | N/A | URI | 1 | RDF type of the place | Expected value: "schema:Place" |
| name | schema:name | N/A | text | 0-1 | Name of the time place |
*recommended
Class:PrimarySource
| Property | RDF property | DB property type | Expected type | Obligation | Definition | Notes |
|---|---|---|---|---|---|---|
| id | N/A | attribute | text | 1 | Unique id of the PS | |
@id | @id | N/A | URI | 1 | Unambiguous URI of the PS | |
| @type | @type | N/A | URI | 1 | RDF type of the PS | Expected value: "schema:MediaObject" |
| name | schema:name | attribute | test | 0-1* | Name or brief caption describing the PS | |
| aggregation | dct:references | attribute | ore:Aggregation (RDF) URI (DB) | 1 | The DPLA aggregation representing the PS | |
thumbnail | schema:thumbnailUrl | attribute | URI | 0-1* | A thumbnail representation of the PS | |
| text | schema:text ontowiki:Markdown | attribute | markdown | 0-1 | Narrative description, transcription, citation, or other text describing the PS | |
| encoding format | schema:encodingFormat | attribute | text | 0-1* | The format in which the full representation of the PS is encoded | Example: "pdf", "mp3", "jpg" |
| content URL | schema:contentUrl | attribute | URI | 0-1* | A URL pointing to a full representation of the PS | The content URL may be dependent on the authorization status of the user accessing the data. For example, an authorized user may be served the URI for the full representation of the item as hosted by DPLA, while an unauthorized user may be served the value for ore:Aggregation.isShownAt. |
| primary source set | schema:isPartOf | relationship | Class:PrimarySourceSet schema:CreativeWork | 1 | The primary source set to which this primary source belongs |
*recommended
Class:PrimarySourceSet
| Property | RDF property | DB property type | Expected type | Obligation | Definition | Notes |
|---|---|---|---|---|---|---|
| id | N/A | attribute | text | 1 | Unique id of the PSS | |
| slug | N/A | attribute | text | 0-1* | Human-readable slug to be used in the construction of a URL for the PSS | |
@id | @id | N/A | URI | 1 | Unambiguous URI of the PSS | |
| @type | @type | N/A | URI | 1 | RDF type of the PSS | Expected value: "schema:CreativeWork" |
| name | schema:name | attribute | text | 0-1* | Name of the PSS | |
| image | schema:image | attribute | URI | 0-1* | Large version of image representing PSS | |
| thumbnail | schema:thumnailUrl | attribute | URI | 0-1* | Small version of image representing PSS | |
| description | schema:description | attribute | text | 0-1* | Brief description of the PSS | Example: "This collection uses primary sources to explore the French and Indian War." |
| date created | schema:dateCreated | attribute | ISO 8601 date format (yyyy-mm-dd) | 1 | Date the PSS was created | |
| date modified | schema:dateModified | attribute | ISO 8601 date format (yyyy-mm-dd) | 0-1 | Date the PSS was most recently modified | |
| text | schema:text ontowiki:Markdown | attribute | markdown | 0-1 | Narrative overview of the PSS | PrimarySourceSet:text and PrimarySourceSet:resources may be concatenated to form a single schema:text field |
| resources | schema:text ontowiki:Markdown | attribute | markdown | 0-1 | Narrative information regarding resources for further research | Can include links to additional sources and tips for finding related materials in the DPLA PrimarySourceSet:text and PrimarySourceSet:resources may be concatenated to form a single schema:text field |
| primary source | schema:hasPart | relationship | Class:PrimarySource schema:MediaObject | 0-n* | Primary sources in the PSS | |
| teaching guide | schema:hasPart | relationship | Class:TeachingGuide schema:CreativeWork | 0-n* | Teaching guide associated with the PSS | |
| subject | schema:about | relationship | Class:Subject schema:Thing | 0-n* | Educational subject of the PSS | |
| time period | dct:temporal | relationship | Class:TimePeriod dct:PeriodOfTime | 0-n* | Temporal subject of the PSS | |
| author | schema:author | relationship | Class:Person schema:Person | 0-n* | Author of the PSS | |
| publisher | schema:publisher | N/A | Class:Organization schema:Organization | 0-1 | Publisher of the PSS | The publisher for all PSS's is DPLA. |
| language | schema:inLanguage | N/A | schema:Language | 0-n | Primary language of the PSS | |
| media type | dct:type | N/A | dct:DCMIType | 0-1 | The set of classes specified by the DCMI Type Vocabulary, used to categorize the nature or genre of the resource.
| Expected value: "dcmitype:InteractiveResource" |
| learning resource type | schema:learningResourceType | N/A | text | 0-1 | Predominant type of kind characterizing the learning resource | Expected value: "Source Set" |
| interactivity type | schema:interactivityType | N/A | text | 0-1 | Predominant mode of learning supported by the learning resource | Expected value: "Interactive" Vocabulary: Learning Registry Metadata Initiative suggested terms |
| license | schema:license | N/A | URI | 0-1 | URL where the owner specifies permissions for using the resource | Expected value: "http://dp.la/info/terms/" |
| educational alignment | schema:educationalAlignment | N/A | schema:alignmentObject | 0-n | An alignment to an established educational framework | |
| accessibility feature | schema:accessibilityFeature | N/A | text | 0-n | Content features of the resource, such as accessible media, alternatives and supported enhancements for accessibility | Expected values: "captions", "structuralNavigation", "audioControl", "videoControl" Vocabulary: Learning Registry Metadata Initiative suggested terms |
| accessibility hazard | schema:accessibilityHazard | N/A | text | 0-n | A characteristic of the described resource that is physiologically dangerous to some users. Related to WCAG 2.0 guideline 2.3 | Expected values: "noFlashingHazard", "motionSimulation", "noSoundHazard" Vocabulary: Learning Registry Metadata Initiative suggested terms |
| accessibility control | schema:accessibilityControl | N/A | text | 0-n | Identifies input methods that are sufficient to fully control the described resource | Expected values: "fullMouseControl" Vocabulary: Learning Registry Metadata Initiative suggested terms |
*recommended
Class:Subject
| Property | RDF property | DB property type | Expected type | Obligation | Definition | Notes |
|---|---|---|---|---|---|---|
| id | N/A | attribute | text | 1 | Unique id of the subject | |
| @type | @type | N/A | URI | 1 | RDF type of the subject | Expected value: "schema:Thing" |
| name | schema:name | attribute | text | 1 | Name of the subject | |
| lrmi | N/A | attribute | boolean | 1 | If true, the subject is intended for used in the Learning Registry Metadata Initiative | Default: true |
| filter | N/A | attribute | boolean | 1 | If true, the subject is intended for use as a filter in the DPLA web interface | Default: false |
*recommended
Class:TeachingGuide
| Property | RDF property | DB property type | Expected type | Obligation | Definition | Notes |
|---|---|---|---|---|---|---|
| id | N/A | attribute | text | 1 | Unique id of the teaching guide | |
@id | @id | N/A | URI | 1 | Unambiguous URI of the teaching guide | |
| @type | @type | N/A | URI | 1 | RDF type of the teaching guide | Expected value: "schema:CreativeWork" |
| name | schema:name | attribute | text | 0-1* | Name of the teaching guide | |
text | schema:text ontowiki:Markdown | attribute | markdown | 0-1 | Textual content of the teaching guide, such as questions and activity | |
| primary source set | schema:isPartOf | relationship | Class:PrimarySourceSet schema:CreativeWork | 1 | The primary source set to which this teaching guide belongs | |
| author | scheme:author | relationship | Class:Person schema:Person | 0-n | The author of this teaching guide |
*recommended
Class:TimePeriod
| Property | RDF property | DB property type | Expected type | Obligation | Definition | Notes |
|---|---|---|---|---|---|---|
| id | N/A | attribute | text | 1 | Unique id of the time period | |
| @type | @type | N/A | URI | 1 | RDF type of the time period | Expected value: "dct:PeriodOfTime" |
| name | schema:name | attribute | text | 1 | Name of the time period | |
| lrmi | N/A | attribute | boolean | 1 | If true, the time period is intended for used in the Learning Registry Metadata Initiative as a subject term | Default: true |
| filter | N/A | attribute | boolean | 1 | If true, the time period is intended for use as a filter in the DPLA web interface | Default: false |
*recommended