LTI Variable Substitutions

Variable substitution (aka variable expansion) is where custom variables really start to shine. They provide a mechanism for tool providers to request that specific, contextual information be sent across in the launch. When the tool consumer processes the launch request, it detects requested variable substitutions and sends the appropriate data where possible. Adding variable substitutions is exactly the same as adding custom variables, except the values are variables instead of constants. This is denoted by prefixing the value with a $. If the tool consumer doesn't recognize, or can't substitute, the value it will just send the variable as if it were are regular custom variable (i.e. the name of the substitution variable will be sent rather than the value).

This allows Canvas to expose data as LTI launch parameters during the LTI launch rather than requiring access to the Canvas API, which can be expensive for Canvas and the tool. It allows tool providers to be much more surgical when requesting user data, and it paves the way for us to be more transparent to tool installers, by showing them exactly what data the LTI tool will be given access to. Additionally, variable substitutions are generally simple to add to Canvas relative to gaining API access.

There are currently over 80 substitutions available. Many of the substitutions simply give access to additional user and context information. An LTI tool can request things like SIS ids, names, an avatar image, and an email address. Other variable substitutions assist tools with accessibility (prefersHighContrast), course copy (previousCourseIds), and masquerading users. Additionally, when we don't provide enough information or customization directly through LTI, tools can request everything they need to use the Canvas API for an even richer experience.

Some substitutions may be used as 'enabled_capabilities' for LTI2 tools. These substitutions have a 'Launch Parameter' label indicating the parameter name that will be sent in the tool launch if enabled.

For more information on variable substitution, see the IMS LTI specification.

Usage/Configuration

Variable substitutions can be configured for a tool in 3 ways:

Via UI

Custom fields can be configured via UI by editing the tool configuration and adding the desired variable to the Custom Fields text box.

The following would add the domain as a launch parameter called custom_arbitrary_name:

arbitrary_name=$Canvas.api.domain

Via API

Custom fields can also be configured via API.

This would install a course-level tool with domain as a custom field:

curl 'https://<domain>.instructure.com/api/v1/courses/<course_id>/external_tools' \
  -X POST \
  -H "Authorization: Bearer <token>;" \
  -F 'name=LTI Example' \
  -F 'consumer_key=some_key' \
  -F 'shared_secret=some_secret' \
  -F 'url=https://example.com/ims/lti' \
  -F 'privacy_level=name_only' \
  -F 'custom_fields[domain]=$Canvas.api.domain'

Via JSON Configuration (LTI 1.3)

JSON can be used to configure an LTI 1.3 Developer Key.

The following JSON would create a developer key with the a placement specfic custom field and a tool-level custom field:

{  
   "title":"Variable Expansion Tool",
   "scopes":[  

   ],
   "extensions":[  
      {  
         "domain":"variableexpander.com",
         "tool_id":"variable-expansion-example",
         "platform":"canvas.instructure.com",
         "settings":{  
            "text":"Variation Expansion Tool Text",
            "icon_url":"https://some.icon.url",
            "placements":[  
               {  
                  "text":"User Navigation Placement",
                  "enabled":true,
                  "icon_url":"https://static.thenounproject.com/png/131630-200.png",
                  "placement":"user_navigation",
                  "message_type":"LtiResourceLinkRequest",
                  "target_link_uri":"https://lti-ri.imsglobal.org/lti/tools/281/launches",
                  "canvas_icon_class":"icon-lti",
                  "custom_fields":{  
                     "foo":"$Canvas.user.id"
                  }
               }
            ]
         }
      }
   ],
   "public_jwk":{  
      "kty":"RSA",
      "alg":"RS256",
      "e":"AQAB",
      "kid":"8f796169-0ac4-48a3-a202-fa4f3d814fcd",
      "n":"nZD7QWmIwj-3N_RZ1qJjX6CdibU87y2l02yMay4KunambalP9g0fU9yZLwLX9WYJINcXZDUf6QeZ-SSbblET-h8Q4OvfSQ7iuu0WqcvBGy8M0qoZ7I-NiChw8dyybMJHgpiP_AyxpCQnp3bQ6829kb3fopbb4cAkOilwVRBYPhRLboXma0cwcllJHPLvMp1oGa7Ad8osmmJhXhM9qdFFASg_OCQdPnYVzp8gOFeOGwlXfSFEgt5vgeU25E-ycUOREcnP7BnMUk7wpwYqlE537LWGOV5z_1Dqcqc9LmN-z4HmNV7b23QZW4_mzKIOY4IqjmnUGgLU9ycFj5YGDCts7Q",
      "use":"sig"
   },
   "description":"1.3 Test Tool",
   "custom_fields":{  
      "bar":"$Canvas.user.sisid"
   },
   "target_link_uri":"https://your.target_link_uri",
   "oidc_initiation_url":"https://your.oidc_initiation_url"
}

Via XML Configuration (LTI 1.1)

Custom fields can also be configured via XML.

This would create a tool in a course with custom fields, some of which are specific for a particular placement:

<?xml version="1.0" encoding="UTF-8"?>
   <cartridge_basiclti_link xmlns="http://www.imsglobal.org/xsd/imslticc_v1p0"
       xmlns:blti = "http://www.imsglobal.org/xsd/imsbasiclti_v1p0"
       xmlns:lticm ="http://www.imsglobal.org/xsd/imslticm_v1p0"
       xmlns:lticp ="http://www.imsglobal.org/xsd/imslticp_v1p0"
       xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation = "http://www.imsglobal.org/xsd/imslticc_v1p0 http://www.imsglobal.org/xsd/lti/ltiv1p0/imslticc_v1p0.xsd
       http://www.imsglobal.org/xsd/imsbasiclti_v1p0 http://www.imsglobal.org/xsd/lti/ltiv1p0/imsbasiclti_v1p0.xsd
       http://www.imsglobal.org/xsd/imslticm_v1p0 http://www.imsglobal.org/xsd/lti/ltiv1p0/imslticm_v1p0.xsd
       http://www.imsglobal.org/xsd/imslticp_v1p0 http://www.imsglobal.org/xsd/lti/ltiv1p0/imslticp_v1p0.xsd">
     <blti:title>Wikipedia</blti:title>
     <blti:launch_url>https://www.wikipedia.org/</blti:launch_url>
     <blti:custom>
       <lticm:property name="user_sis_id">$Person.sourcedId</lticm:property>
     </blti:custom>
     <blti:extensions platform="canvas.instructure.com">
       <lticm:property name="domain">wikipedia.org</lticm:property>
       <lticm:options name="custom_fields">
           <lticm:property name="canvas_api_domain">$Canvas.api.domain</lticm:property>
           <lticm:property name="canvas_user_id">$Canvas.user.id</lticm:property>
       </lticm:options>
       <lticm:options name="course_navigation">
         <lticm:property name="url">https://en.wikipedia.org/wiki/Wikipedia:Unusual_articles#mediaviewer/File:Cow-on_pole,_with_antlers.jpeg</lticm:property>
         <lticm:property name="text">Cow With Antlers</lticm:property>
         <lticm:options name="custom_fields">
           <lticm:property name="concluded_roles">$Canvas.membership.concludedRoles</lticm:property>
         </lticm:options>
       </lticm:options>
     </blti:extensions>
   </cartridge_basiclti_link>

Supported Substitutions

com.instructure.User.observees

If the current user is an observer in the launch context, this substitution returns a comma-separated list of user IDs linked to the current user for observing. For LTI 1.3 tools, the user IDs will correspond to the "sub" claim made in LTI 1.3 launches (a UUIDv4), while for all other tools, the user IDs will be the user's typical LTI ID.

Returns an empty string otherwise.

Availability: when launched in a course
Launch Parameter: com_instructure_user_observees

 LTI 1.3: "a6e2e413-4afb-4b60-90d1-8b0344df3e91",
 All Others: "c0ddd6c90cbe1ef0f32fbce5c3bf654204be186c"

com.instructure.User.sectionNames

Returns an array of the section names that the user is enrolled in, if the context of the tool launch is within a course.

Availability: when launched from a course
Launch Parameter: com_instructure_user_section_names

[ "Section 1", "Section 5", "TA Section"]

com.instructure.Observee.sisIds

returns all observee ids linked to this observer as an String separated by ,.

Availability: when launched in a course
Launch Parameter: com_instructure_observee_sis_ids

"A123,B456,..."

Context.title

The title of the context.

Availability: always
Launch Parameter: context_title

"Example Course"

com.instructure.Editor.contents

The contents of the text editor associated with the content item launch.

Availability: always
Launch Parameter: com_instructure_editor_contents

"This text was in the editor"

com.instructure.Editor.selection

The contents the user has selected in the text editor associated with the content item launch.

Availability: always
Launch Parameter: com_instructure_editor_selection

"this text was selected by the user"

com.instructure.PostMessageToken

A token that can be used for frontend communication between an LTI tool and Canvas via the Window.postMessage API.

Availability: **
Launch Parameter: com_instructure_post_message_token

"9ae4170c-6b64-444d-9246-0b7dedd5f560"

com.instructure.Assignment.lti.id

The LTI assignment id of an assignment. This value corresponds with the ext_lti_assignment_id send in various launches and webhooks.

Availability: always
Launch Parameter: com_instructure_assignment_lti_id

"9ae4170c-6b64-444d-9246-0b7dedd5f560"

com.instructure.OriginalityReport.id

The Canvas id of the Originality Report associated with the launch.

Availability: **
Launch Parameter: com_instructure_originality_report_id

23

com.instructure.Submission.id

The Canvas id of the submission associated with the launch.

Availability: **
Launch Parameter: com_instructure_submission_id

23

com.instructure.File.id

The Canvas id of the file associated with the submission in the launch.

Availability: **
Launch Parameter: com_instructure_file_id

23

CourseOffering.sourcedId

the LIS identifier for the course offering.

Availability: when launched in a course
Launch Parameter: lis_course_offering_sourcedid

1234

Context.id

an opaque identifier that uniquely identifies the context of the tool launch.

Availability: always
Launch Parameter: context_id

"cdca1fe2c392a208bd8a657f8865ddb9ca359534"

Context.sourcedId

The sourced Id of the context.

Availability: always

1234

Context.id.history

return a string with a comma-separeted list of the context ids of the courses in reverse chronological order from which content has been copied.

Availability: when launched in a course

"789,456,123"

Message.documentTarget

communicates the kind of browser window/frame where the Canvas has launched a tool.

Availability: always
Launch Parameter: launch_presentation_document_target

"iframe"

Message.locale

returns the current locale.

Availability: always
Launch Parameter: launch_presentation_locale

"de"

ToolConsumerInstance.guid

returns a unique identifier for the Tool Consumer (Canvas).

Availability: always
Launch Parameter: tool_consumer_instance_guid

"0dWtgJjjFWRNT41WdQMvrleejGgv7AynCVm3lmZ2:canvas-lms"

Canvas.api.domain

returns the canvas domain for the current context.

Availability: always

"canvas.instructure.com"

Canvas.api.collaborationMembers.url

returns the api url for the members of the collaboration.

Availability: always

"https://canvas.instructure.com/api/v1/collaborations/1/members"

Canvas.api.baseUrl

returns the base URL for the current context.

Availability: always

"https://canvas.instructure.com"

ToolProxyBinding.memberships.url

returns the URL for the membership service associated with the current context.

This variable is for future use only. Complete support for the IMS Membership Service has not been added to Canvas. This will be updated when we fully support and certify the IMS Membership Service.

Availability: always

"https://canvas.instructure.com/api/lti/courses/1/membership_service"

Canvas.account.id

returns the account id for the current context.

Availability: always

1234

Canvas.account.name

returns the account name for the current context.

Availability: always

"School Name"

Canvas.account.sisSourceId

returns the account's sis source id for the current context.

Availability: always

"sis_account_id_1234"

Canvas.rootAccount.id

returns the Root Account ID for the current context.

Availability: always

1234

Canvas.rootAccount.sisSourceId

returns the root account's sis source id for the current context.

Availability: always

"sis_account_id_1234"

Canvas.externalTool.url

returns the URL for the external tool that was launched. Only available for LTI 1.

Availability: always and when in an LTI 1

"http://example.url/path"

com.instructure.brandConfigJSON.url

returns the URL to retrieve the brand config JSON for the launching context.

Availability: always

"http://example.url/path.json"

com.instructure.brandConfigJSON

returns the brand config JSON itself for the launching context.

Availability: always

{"ic-brand-primary-darkened-5":"#0087D7"}

com.instructure.brandConfigJS.url

returns the URL to retrieve the brand config javascript for the launching context. This URL should be used as the src attribute for a script tag on the external tool provider's web page. It is configured to be used with the instructure-ui node module. More information on on how to use instructure ui react components can be found here.

Availability: always

"http://example.url/path.js"

Canvas.css.common

returns the URL for the common css file.

Availability: always

"http://example.url/path.css"

Canvas.shard.id

returns the shard id for the current context.

Availability: always

1234

Canvas.root_account.global_id [duplicates Canvas.user.globalId]

returns the root account's global id for the current context.

Availability: always

123400000000123

Canvas.root_account.id [deprecated]

returns the root account id for the current context.

Availability: always

1234

vnd.Canvas.root_account.uuid

returns the account uuid for the current context.

Availability: always
Launch Parameter: vnd_canvas_root_account_uuid

"Ioe3sJPt0KZp9Pw6xAvcHuLCl0z4TvPKP0iIOLbo"

Canvas.root_account.sisSourceId [deprecated]

returns the root account sis source id for the current context.

Availability: always

1234

Canvas.course.id

returns the current course id.

Availability: when launched in a course

1234

vnd.instructure.Course.uuid

returns the current course uuid.

Availability: when launched in a course

"S3vhRY2pBzG8iPdZ3OBPsPrEnqn5sdRoJOLXGbwc"

Canvas.course.name

returns the current course name.

Availability: when launched in a course

"Course Name"

Canvas.course.sisSourceId

returns the current course sis source id.

Availability: when launched in a course

1234

Canvas.course.startAt

returns the current course start date.

Availability: when launched in a course

2018-01-15 00:00:00 -0700

Canvas.course.endAt

returns the current course end date.

Availability: when launched in a course

2018-05-01 00:00:00 -0700

Canvas.course.workflowState

returns the current course workflow state. Workflow states of "claimed" or "created" indicate an unpublished course.

Availability: when launched in a course

"active"

Canvas.term.startAt

returns the current course's term start date.

Availability: when launched in a course that has a term with a start date

2018-01-12 00:00:00 -0700

Canvas.term.name

returns the current course's term name.

Availability: **
Launch Parameter: canvas_term_name

"W1 2017"

CourseSection.sourcedId

returns the current course sis source id to return the section source id use Canvas.course.sectionIds.

Availability: when launched in a course
Launch Parameter: lis_course_section_sourcedid

1234

Canvas.enrollment.enrollmentState

returns the current course enrollment state.

Availability: when launched in a course

"active"

com.instructure.Assignment.anonymous_grading

returns true if the assignment has anonymous grading enabled.

Availability: when launched as an assignment
Launch Parameter: com_instructure_assignment_anonymous_grading

true

com.Instructure.membership.roles

returns the current course membership roles using the LIS v2 vocabulary.

Availability: when launched from a course or an account
Launch Parameter: com_instructure_membership_roles

"http://purl.imsglobal.org/vocab/lis/v2/institution/person#Student"

Canvas.membership.roles

returns the current course membership roles.

Availability: when launched from a course or an account
Launch Parameter: canvas_membership_roles

"StudentEnrollment"

Canvas.membership.concludedRoles

This is a list of IMS LIS roles should have a different key.

Availability: when launched in a course

"urn:lti:sysrole:ims/lis/None"

Canvas.course.previousContextIds

With respect to the current course, returns the context ids of the courses from which content has been copied (excludes cartridge imports).

Availability: when launched in a course

"1234,4567"

Canvas.course.previousContextIds.recursive

With respect to the current course, recursively returns the context ids of the courses from which content has been copied (excludes cartridge imports).

Availability: when launched in a course

"1234,4567"

Canvas.course.previousCourseIds

With respect to the current course, returns the course ids of the courses from which content has been copied (excludes cartridge imports).

Availability: when launched in a course

1234

Person.name.full

Returns the full name of the launching user.

Availability: when launched by a logged in user
Launch Parameter: lis_person_name_full

"John Doe"

Person.name.display

Returns the display name of the launching user.

Availability: when launched by a logged in user
Launch Parameter: person_name_display

"John Doe"

Person.name.family

Returns the last name of the launching user.

Availability: when launched by a logged in user
Launch Parameter: lis_person_name_family

"Doe"

Person.name.given

Returns the first name of the launching user.

Availability: when launched by a logged in user
Launch Parameter: lis_person_name_given

"John"

com.instructure.Person.name_sortable

Returns the sortable name of the launching user.

Availability: when launched by a logged in user
Launch Parameter: com_instructure_person_name_sortable

"Doe, John"

Person.email.primary

Returns the primary email of the launching user.

Availability: when launched by a logged in user
Launch Parameter: lis_person_contact_email_primary

"john.doe@example.com"

com.instructure.Person.pronouns

Returns pronouns for the current user.

Availability: when launched by a logged in user
Launch Parameter: com_instructure_person_pronouns

"She/Her"

vnd.Canvas.Person.email.sis

Returns the institution assigned email of the launching user.

Availability: when launched by a logged in user that was added via SIS

"john.doe@example.com"

Person.address.timezone

Returns the name of the timezone of the launching user.

Availability: when launched by a logged in user

"America/Denver"

User.image

Returns the profile picture URL of the launching user.

Availability: when launched by a logged in user
Launch Parameter: user_image

"https://example.com/picture.jpg"

User.id [duplicates Canvas.user.id]

Returns the Canvas user_id of the launching user.

Availability: when launched by a logged in user
Launch Parameter: user_id

420000000000042

Canvas.user.id [duplicates User.id]

Returns the Canvas user_id of the launching user.

Availability: when launched by a logged in user

420000000000042

vnd.instructure.User.uuid [duplicates User.uuid]

Returns the Canvas user_uuid of the launching user for the context.

Availability: when launched by a logged in user

"N2ST123dQ9zyhurykTkBfXFa3Vn1RVyaw9Os6vu3"

vnd.instructure.User.current_uuid [duplicates User.uuid]

Returns the current Canvas user_uuid of the launching user.

Availability: when launched by a logged in user

"N2ST123dQ9zyhurykTkBfXFa3Vn1RVyaw9Os6vu3"

Canvas.user.prefersHighContrast

Returns the users preference for high contrast colors (an accessibility feature).

Availability: when launched by a logged in user

false

com.instructure.Course.groupIds

returns the Canvas ids of all active groups in the current course.

Availability: when launched in a course
Launch Parameter: com_instructure_course_groupids

"23,24,..."

Canvas.group.contextIds

returns the context ids for the groups the user belongs to in the course.

Availability: always

"1c16f0de65a080803785ecb3097da99872616f0d,d4d8d6ae1611e2c7581ce1b2f5c58019d928b79d,..."

Membership.role

Returns the IMS LTI membership service roles for filtering via query parameters. Or, for LTI 1.3 tools, returns the IMS LTI Names and Role Provisioning Service roles for filtering via query parameters.

Availability: when launched by a logged in user
Launch Parameter: roles

"http://purl.imsglobal.org/vocab/lis/v2/institution/person#Administrator"

Canvas.xuser.allRoles [duplicates ext_roles which is sent by default]

Returns list of LIS role full URNs. Note that this will include all roles the user has. There are 3 different levels of roles defined: Context, Institution, System. Context role urns start with "urn:lti:ims" and include roles for the context where the launch occurred. Institution role urns start with "urn:lti:instrole" and include roles the user has in the institution. This will include roles they have in other courses or at the account level. Note that there is not a TA role at the Institution level. Instead Users with a TA enrollment will have an institution role of Instructor. System role urns start with "urn:lti:sysrole" and include roles for the entire system.

Availability: always

"urn:lti:instrole:ims/lis/Administrator,urn:lti:instrole:ims/lis/Instructor,urn:lti:sysrole:ims/lis/SysAdmin,urn:lti:sysrole:ims/lis/User"

com.instructure.User.allRoles

Same as "Canvas.xuser.allRoles", but uses roles formatted for LTI Advantage.

Availability: always

 "http://purl.imsglobal.org/vocab/lis/v2/institution/person#Student",
 "http://purl.imsglobal.org/vocab/lis/v2/membership#Instructor",
 "http://purl.imsglobal.org/vocab/lis/v2/system/person#User"

Canvas.user.globalId [duplicates Canvas.root_account.global_id]

Returns the Canvas global user_id of the launching user.

Availability: when launched by a logged in user

420000000000042

Canvas.user.isRootAccountAdmin

Returns true for root account admins and false for all other roles.

Availability: when launched by a logged in user

true

User.username [duplicates Canvas.user.loginId]

Username/Login ID for the primary pseudonym for the user for the account. This may not be the pseudonym the user is actually logged in with.

Availability: when pseudonym is in use

"jdoe"

Canvas.user.loginId [duplicates User.username]

Username/Login ID for the primary pseudonym for the user for the account. This may not be the pseudonym the user is actually logged in with.

Availability: when pseudonym is in use

"jdoe"

Canvas.user.sisSourceId [duplicates Person.sourcedId]

Returns the sis source id for the primary pseudonym for the user for the account This may not be the pseudonym the user is actually logged in with.

Availability: when pseudonym is in use

"sis_user_42"

Canvas.user.sisIntegrationId

Returns the integration id for the primary pseudonym for the user for the account This may not be the pseudonym the user is actually logged in with.

Availability: when pseudonym is in use

"integration_user_42"

Person.sourcedId [duplicates Canvas.user.sisSourceId]

Returns the sis source id for the primary pseudonym for the user for the account This may not be the pseudonym the user is actually logged in with.

Availability: when pseudonym is in use
Launch Parameter: lis_person_sourcedid

"sis_user_42"

Canvas.logoutService.url

Returns the logout service url for the user. This is the pseudonym the user is actually logged in as. It may not hold all the sis info needed in other launch substitutions.

Availability: always

"https://<domain>.instructure.com/api/lti/v1/logout_service/<external_tool_id>-<user_id>-<current_unix_timestamp>-<opaque_string>"

Canvas.masqueradingUser.id

Returns the Canvas user_id for the masquerading user. This is the pseudonym the user is actually logged in as. It may not hold all the sis info needed in other launch substitutions.

Availability: when the user is being masqueraded

420000000000042

Canvas.masqueradingUser.userId

Returns the 40 character opaque user_id for masquerading user. This is the pseudonym the user is actually logged in as. It may not hold all the sis info needed in other launch substitutions.

Availability: when the user is being masqueraded

"da12345678cb37ba1e522fc7c5ef086b7704eff9"

Canvas.xapi.url

Returns the xapi url for the user.

Availability: always

"https://<domain>.instructure.com/api/lti/v1/xapi/<external_tool_id>-<user_id>-<course_id>-<current_unix_timestamp>-<opaque_id>"

Caliper.url

Returns the caliper url for the user.

Availability: always

"https://<domain>.instructure.com/api/lti/v1/caliper/<external_tool_id>-<user_id>-<course_id>-<current_unix_timestamp>-<opaque_id>"

Canvas.course.sectionIds

Returns a comma separated list of section_id's that the user is enrolled in.

Availability: when launched from a course

"42, 43"

Canvas.course.sectionRestricted

Returns true if the user can only view and interact with users in their own sections.

Availability: when launched from a course

true

Canvas.course.sectionSisSourceIds

Returns a comma separated list of section sis_id's that the user is enrolled in.

Availability: when launched from a course

"section_sis_id_1, section_sis_id_2"

com.instructure.contextLabel

Returns the course code.

Availability: when launched in a course
Launch Parameter: context_label

"CS 124"

Canvas.module.id

Returns the module_id that the module item was launched from.

Availability: when content tag is present

1234

Canvas.moduleItem.id

Returns the module_item_id of the module item that was launched.

Availability: when content tag is present

1234

Canvas.assignment.id

Returns the assignment_id of the assignment that was launched.

Availability: when launched as an assignment

1234

com.instructure.Group.id

Returns the Canvas id of the group the current user is in if launching from a group assignment.

Availability: when launched by a logged in user and when launched as an assignment
Launch Parameter: vnd_canvas_group_id

481

com.instructure.Group.name

Returns the name of the group the current user is in if launching from a group assignment.

Availability: when launched by a logged in user and when launched as an assignment
Launch Parameter: vnd_canvas_group_name

"Group One"

Canvas.assignment.title

Returns the title of the assignment that was launched.

Availability: when launched as an assignment

"Deep thought experiment"

Canvas.assignment.pointsPossible

Returns the points possible of the assignment that was launched.

Availability: when launched as an assignment

100

Canvas.assignment.unlockAt [deprecated]

deprecated in favor of ISO8601.

Availability: when launched as an assignment

Canvas.assignment.lockAt [deprecated]

deprecated in favor of ISO8601.

Availability: when launched as an assignment

Canvas.assignment.dueAt [deprecated]

deprecated in favor of ISO8601.

Availability: when launched as an assignment

Canvas.assignment.unlockAt.iso8601

Returns the unlock_at date of the assignment that was launched. Only available when launched as an assignment with an unlock_at set.

Availability: always

2018-02-18T00:00:00Z

Canvas.assignment.lockAt.iso8601

Returns the lock_at date of the assignment that was launched. Only available when launched as an assignment with a lock_at set.

Availability: always

2018-02-20:00:00Z

Canvas.assignment.dueAt.iso8601

Returns the due_at date of the assignment that was launched. Only available when launched as an assignment with a due_at set.

Availability: always

2018-02-19:00:00Z

Canvas.assignment.published

Returns true if the assignment that was launched is published. Only available when launched as an assignment.

Availability: when launched as an assignment

true

Canvas.assignment.lockdownEnabled

Returns true if the assignment is LDB enabled. Only available when launched as an assignment.

Availability: when launched as an assignment

true

LtiLink.custom.url

Returns the endpoint url for accessing link-level tool settings Only available for LTI 2.0.

Availability: always

"https://<domain>.instructure.com/api/lti/tool_settings/<link_id>"

ToolProxyBinding.custom.url

Returns the endpoint url for accessing context-level tool settings Only available for LTI 2.0.

Availability: always

"https://<domain>.instructure.com/api/lti/tool_settings/<binding_id>"

ToolProxy.custom.url

Returns the endpoint url for accessing system-wide tool settings Only available for LTI 2.0.

Availability: always

"https://<domain>.instructure.com/api/lti/tool_settings/<proxy_id>"

ToolConsumerProfile.url

Returns the Tool Consumer Profile url for the tool. Only available for LTI 2.0.

Availability: always

"https://<domain>.instructure.com/api/lti/courses/<course_id>/tool_consumer_profile/<opaque_id>"
"https://<domain>.instructure.com/api/lti/accounts/<account_id>/tool_consumer_profile/<opaque_id>"

vnd.Canvas.OriginalityReport.url

The originality report LTI2 service endpoint.

Availability: always
Launch Parameter: vnd_canvas_originality_report_url

"api/lti/assignments/{assignment_id}/submissions/{submission_id}/originality_report"

vnd.Canvas.submission.url

The submission LTI2 service endpoint.

Availability: always
Launch Parameter: vnd_canvas_submission_url

"api/lti/assignments/{assignment_id}/submissions/{submission_id}"

vnd.Canvas.submission.history.url

The submission history LTI2 service endpoint.

Availability: always
Launch Parameter: vnd_canvas_submission_history_url

"api/lti/assignments/{assignment_id}/submissions/{submission_id}/history"

Canvas.file.media.id

Availability: when an attachment is present and it has either a media object or media entry id defined

Canvas.file.media.type

Availability: when an attachment is present and has a media object defined

Canvas.file.media.duration

Availability: when an attachment is present and has a media object defined

Canvas.file.media.size

Availability: when an attachment is present and has a media object defined

Canvas.file.media.title

Availability: when an attachment is present and has a media object defined

Canvas.file.usageRights.name

Availability: when an attachment is present and has usage rights defined

Canvas.file.usageRights.url

Availability: when an attachment is present and has usage rights defined

Canvas.file.usageRights.copyrightText

Availability: when an attachment is present and has usage rights defined

com.instructure.Course.accept_canvas_resource_types

Returns the types of resources that can be imported to the current page, forwarded from the request. Value is a comma-separated array of one or more values of: ["assignment", "assignment_group", "audio", "discussion_topic", "document", "image", "module", "quiz", "page", "video"].

Availability: always
Launch Parameter: com_instructure_course_accept_canvas_resource_types

"page"
"module"
"assignment,discussion_topic,page,quiz,module"

com.instructure.Course.canvas_resource_type

Returns the target resource type for the current page, forwarded from the request. Value is the largest logical unit of the page. Possible values are: ["assignment", "assignment_group", "audio", "discussion_topic", "document", "image", "module", "quiz", "page", "video"] on Pages Index -> 'page' on Modules -> 'module' and so on.

Availability: always
Launch Parameter: com_instructure_course_canvas_resource_type

page

com.instructure.Course.allow_canvas_resource_selection

Returns whether a content can be imported into a specific group on the page, forwarded from the request. True for Modules page and Assignment Groups page. False for other content index pages.

Availability: always
Launch Parameter: com_instructure_course_allow_canvas_resource_selection

true

com.instructure.Course.available_canvas_resources

Returns a JSON-encoded list of content groups which can be selected, providing ID and name of each group, forwarded from the request. Empty value if com.instructure.Course.allow_canvas_resource_selection is false.

Availability: always
Launch Parameter: com_instructure_course_available_canvas_resources

[{"id":"3","name":"First Module"},{"id":"5","name":"Second Module"}]