---
# System prepended metadata

title: Memometrici

---

# Memometrici
## YouTrack API (useful links)

<YouTrack Service URL> is the Base URL of the YouTrack service in your network environment.

[Fields Syntax﻿
](https://www.jetbrains.com/help/youtrack/standalone/api-fields-syntax.html) In YouTrack REST API, when you send an HTTP request to a resource, by default, the server sends back only the ID of the resource entity. To receive an attribute in the response from server, you must specify it explicitly in the fields parameter of a request.

[Custom fields](https://www.jetbrains.com/help/youtrack/standalone/api-concept-custom-fields.html) This page describes the hierarchy of custom fields in YouTrack and how the CustomField, ProjectCustomField, and IssueCustomField entities differ from each other.

[JSON schema](https://www.jetbrains.com/help/youtrack/standalone/api-json-schema.html) This page contains all of the entities that are supported by YouTrack REST API.
______
## Entities
[Entities](https://www.jetbrains.com/help/youtrack/standalone/api-entities.html) This section contains the current version of the generated REST API entities reference.

[TimeTrackingUserProfile](https://www.jetbrains.com/help/youtrack/standalone/api-entity-TimeTrackingUserProfile.html) Represents time tracking settings in the user's profile.

[UserGroup](https://www.jetbrains.com/help/youtrack/standalone/api-entity-UserGroup.html) Represents a group of users.

[ProjectTimeTrackingSettings﻿
](https://www.jetbrains.com/help/youtrack/standalone/api-entity-ProjectTimeTrackingSettings.html) Represents time tracking settings of the project.

______

## JSON Schema
### GlobalTimeTrackingSettings﻿
```
"GlobalTimeTrackingSettings" : {
                    "workItemTypes" : "MutableList",
                    "workTimeSettings": "WorkTimeSettings",
                    "id" : "String"
}
```

### IssueTimeTracker﻿
```
"IssueTimeTracker" : {
                    "enabled" : "Boolean",
                    "workItems" : "MutableCollection",
                    "id" : "String"
}
```

###IssueCreatedActivityItem﻿
```
"IssueCreatedActivityItem" : {
                    "container" : "Issue",
                    "id" : "String",
                    "target" : "Issue",
                    "added" : "List",
                    "author" : "User",
                    "category" : "ActivityCategory",
                    "field" : "",
                    "removed" : "List",
                    "targetMember" : "String",
                    "timestamp" : "Long"
}
```

### LinksActivityItem﻿
```
"LinksActivityItem" : {
                    "added" : "List",
                    "removed" : "List",
                    "author" : "User",
                    "category" : "ActivityCategory",
                    "field" : "",
                    "id" : "String",
                    "target" : "",
                    "targetMember" : "String",
                    "timestamp" : "Long"
}
```

### ProjectTimeTrackingSettings﻿
```
"ProjectTimeTrackingSettings" : {
                    "enabled" : "Boolean",
                    "estimate" : "ProjectCustomField",
                    "project" : "Project",
                    "timeSpent" : "ProjectCustomField",
                    "workItemTypes" : "MutableCollection",
                    "id" : "String"
}
```

### TagsActivityItem﻿
```
"TagsActivityItem" : {
                    "added" : "List",
                    "removed" : "List",
                    "author" : "User",
                    "category" : "ActivityCategory",
                    "field" : "",
                    "id" : "String",
                    "target" : "",
                    "targetMember" : "String",
                    "timestamp" : "Long"
}
```

### TimeTrackingUserProfile﻿
```
"TimeTrackingUserProfile" : {
                    "id" : "String",
                    "periodFormat" : "PeriodFieldFormat",
                    "profile" : "TimeTrackingUserProfile"
}
```

### AttachmentActivityItem﻿
```
"AttachmentActivityItem" : {
                    "added" : "List",
                    "author" : "User",
                    "category" : "ActivityCategory",
                    "field" : "",
                    "id" : "String",
                    "removed" : "List",
                    "target" : "",
                    "targetMember" : "String",
                    "timestamp" : "Long"
}
```

### CommentActivityItem﻿
```
"CommentActivityItem" : {
                    "authorGroup" : "UserGroup",
                    "added" : "List",
                    "author" : "User",
                    "category" : "ActivityCategory",
                    "field" : "",
                    "id" : "String",
                    "removed" : "List",
                    "target" : "",
                    "targetMember" : "String",
                    "timestamp" : "Long"
}
```

### CommentAttachmentsActivityItem﻿
```
"CommentAttachmentsActivityItem" : {
                    "added" : "List",
                    "removed" : "List",
                    "author" : "User",
                    "category" : "ActivityCategory",
                    "field" : "",
                    "id" : "String",
                    "target" : "",
                    "targetMember" : "String",
                    "timestamp" : "Long"
}
```

### CustomFieldActivityItem﻿
```
"CustomFieldActivityItem" : {
                    "added" : "Any",
                    "removed" : "Any",
                    "author" : "User",
                    "category" : "ActivityCategory",
                    "field" : "",
                    "id" : "String",
                    "target" : "",
                    "targetMember" : "String",
                    "timestamp" : "Long"
}
```

### DurationValue﻿
```
"DurationValue" : {
                    "id" : "String",
                    "minutes" : "Int",
                    "presentation" : "String"
}
```

###PeriodFieldFormat﻿
```
"PeriodFieldFormat" : {
                    "enumConstantName" : "String",
                    "id" : "String"
}
```

### PeriodProjectCustomField﻿
```
"PeriodProjectCustomField" : {
                    "canBeEmpty" : "Boolean",
                    "emptyFieldText" : "String",
                    "field" : "CustomField",
                    "hasRunningJob" : "Boolean",
                    "id" : "String",
                    "isPublic" : "Boolean",
                    "ordinal" : "Int",
                    "project" : "Project"
}
```

### PeriodValue﻿
```
"PeriodValue" : {
                    "id" : "String",
                    "minutes" : "Int",
                    "presentation" : "String"
}
```

### ProjectActivityItem﻿
```
"ProjectActivityItem" : {
                    "added" : "",
                    "removed" : "",
                    "author" : "User",
                    "category" : "ActivityCategory",
                    "field" : "",
                    "id" : "String",
                    "target" : "",
                    "targetMember" : "String",
                    "timestamp" : "Long"
}
```

### SimpleValueActivityItem﻿
```
"SimpleValueActivityItem" : {
                    "added" : "",
                    "removed" : "",
                    "author" : "User",
                    "category" : "ActivityCategory",
                    "field" : "",
                    "id" : "String",
                    "target" : "",
                    "targetMember" : "String",
                    "timestamp" : "Long"
}
```

### Sprint﻿
```
"Sprint" : {
                    "agile" : "Agile",
                    "archived" : "Boolean",
                    "finish" : "Long",
                    "goal" : "String",
                    "isDefault" : "Boolean",
                    "issues" : "MutableCollection",
                    "name" : "String",
                    "previousSprint" : "Sprint",
                    "start" : "Long",
                    "unresolvedIssuesCount" : "Int",
                    "id" : "String"
                }
```

### SprintActivityItem﻿
```
"SprintActivityItem" : {
                    "added" : "List",
                    "id" : "String",
                    "removed" : "List",
                    "author" : "User",
                    "category" : "ActivityCategory",
                    "field" : "",
                    "target" : "",
                    "targetMember" : "String",
                    "timestamp" : "Long"
                }
```

### TextCustomFieldActivityItem﻿
```
"TextCustomFieldActivityItem" : {
                    "added" : "String",
                    "markup" : "String",
                    "removed" : "String",
                    "author" : "User",
                    "category" : "ActivityCategory",
                    "field" : "",
                    "id" : "String",
                    "target" : "",
                    "targetMember" : "String",
                    "timestamp" : "Long"
                }
```

### TextMarkupActivityItem﻿
```
"TextMarkupActivityItem" : {
                    "added" : "String",
                    "removed" : "String",
                    "author" : "User",
                    "category" : "ActivityCategory",
                    "field" : "",
                    "id" : "String",
                    "markup" : "String",
                    "target" : "",
                    "targetMember" : "String",
                    "timestamp" : "Long"
                }
```

### TimeTrackingUserProfile﻿
```
"TimeTrackingUserProfile" : {
                    "id" : "String",
                    "periodFormat" : "PeriodFieldFormat",
                    "profile" : "TimeTrackingUserProfile"
                }
```

### User﻿
```
 "User" : {
                    "avatarUrl" : "String",
                    "banned" : "Boolean",
                    "email" : "String",
                    "fullName" : "String",
                    "guest" : "Boolean",
                    "jabberAccountName" : "String",
                    "login" : "String",
                    "name" : "String",
                    "online" : "Boolean",
                    "ringId" : "String",
                    "savedQueries" : "List",
                    "tags" : "MutableCollection",
                    "id" : "String"
                }
```

### UserGroup﻿
```
"UserGroup" : {
                    "allUsersGroup" : "Boolean",
                    "icon" : "String",
                    "name" : "String",
                    "ringId" : "String!",
                    "teamForProject" : "Project",
                    "usersCount" : "Long",
                    "id" : "String"
                }
```

### UsesMarkupActivityItem﻿
```
"UsesMarkupActivityItem" : {
                    "added" : "Boolean",
                    "removed" : "Boolean",
                    "author" : "User",
                    "category" : "ActivityCategory",
                    "field" : "",
                    "id" : "String",
                    "markup" : "String",
                    "target" : "",
                    "targetMember" : "String",
                    "timestamp" : "Long"
                }
```

### VcsChangeActivityItem﻿
```
 "VcsChangeActivityItem" : {
                    "added" : "List",
                    "author" : "User",
                    "id" : "String",
                    "removed" : "List",
                    "category" : "ActivityCategory",
                    "field" : "",
                    "target" : "",
                    "targetMember" : "String",
                    "timestamp" : "Long"
                }
```

### 