The GDL project has defined a common set of metadata based on the Learning Resources Metadata Initiative(LRMI). This will ensure quality and allow for the GDL platform to present resources with a consistent set of metadata.

The Global Digital Library metadata is based on the LRMI Specification Version 1.1. The LRMI project has been inspired by other projects with similar visions in furtherance of its goal of interoperating with other specifications. These initiatives are:

Mandatory properties marked with *

Property

Expected Type

Description

metapicture

GIF, JPEG, PNG or SVG

Picture for metadescription

Name *

schema.org/Text

The title of the resource.

Link *

URL

Link til to the resources

linkEpub

URL

Link til EPUB(if different than link)

about *

schema.org/Thing

The subject of the content.

dateCreated *

schema.org/Date

The date on which the resource was created.

author *

schema.org/Person

The individual credited with the creation of the resource.

subject

The subject of the book, according to one of the following schemas:

Select a schema and start typing a keyword to see matching subjects. You can add multiple subjects.

numberOfPages

Referring to numbers of pages in a book(if it is a book)

translator

schema.org/Person

The individual credited with the translation of the resource.

Publisher *

schema.org/Organization

The organization credited with publishing the resource.

inLanguage *

Language code (ISO-639-2) 3-letter or ISO-639-3

The primary language of the resource.

License *

Url or CreativeWork

A license document that applies to this content, typically indicated by URL.

isBasedOnUrl

schema.org/URL

A resource that was used in the creation of this resource. This term can be repeated for multiple sources.

educationalAlignment

schema.org/AlignmentObject

An alignment to an established educational framework.

educationalUse

schema.org/Text

The purpose of the work in the context of education.

  • Ex: “assignment”
  • Ex: “group work”

educationalRole

schema.org/Text

The role that describes the target audience of the content.

timeRequired

schema.org/Duration (ISO

8601)

Approximate or typical time it takes to work with or through this learning resource for the typical intended target audience.

  • Ex: “PT30M”
  • Ex: “PT1H25M”

typicalAgeRange

schema.org/Text

The typical range of ages the content’s intended end user.

  • Ex: “7-9”
  • Ex: “18-“

 level

Indicates reading level.

interactivityType

schema.org/Text

The predominant mode of learning supported by the learning resource. Acceptable values are active, expositive, or mixed.

  • Ex: “active”
  • Ex: “mixed”

learningResourceType

schema.org/Text

The predominant type or kind characterizing the learning resource.

  • Ex: “presentation”
  • Ex: “handout”

accessibilityAPI

Text

Indicates that the resource is compatible with the referenced accessibility API. (WebSchemas wiki lists possible values).

accessibilityControl

Text

Identifies input methods that are sufficient to fully control the described resource. (WebSchemas wiki lists possible values).

accessibilityFeature

Text

Content features of the resource, such as accessible media, alternatives and supported enhancements for accessibility. (WebSchemas wiki lists possible values).

accessibilityHazard

Text

A characteristic of the described resource that is physiologically dangerous to some users. Related to WCAG 2.0 guideline 2.3. (WebSchemas wiki lists possible values).

File formats

Document and file formats for different types of e-books and content (storybooks, textbooks, etc) and other resources that are committed into the GDL platform, there are two preferred formats:

In addition, we ask for a print ready version in PDF(PDF 1.4 - 1.7).

All text needs to be encoded in UTF-8. This includes both metadata and textual content.