# activity-diagrams-qdobr-dtraz-lhxdc-cbow > 2025-03-13 3:18pm
https://universe.roboflow.com/rf-100-vl/activity-diagrams-qdobr-dtraz-lhxdc-cbow

Provided by a Roboflow user
License: MIT

# Overview
- [Introduction](#introduction)
- [Object Classes](#object-classes)
  - [Action](#action)
  - [Activity](#activity)
  - [Comment](#comment)
  - [Control Flow](#control-flow)
  - [Decision Node](#decision-node)
  - [Final Node](#final-node)
  - [Fork](#fork)
  - [Merge](#merge)
  - [Merge Node](#merge-node)
  - [Object](#object)
  - [Start Node](#start-node)
  - [Text](#text)

# Introduction
This dataset aims to annotate elements within UML activity diagrams. It includes a variety of classes, each representing a different node or component within these diagrams. The classes are:
- **Action**: Denotes actions or tasks within the process.
- **Activity**: Represents the entire activity or process state.
- **Comment**: Provides additional information or explanations.
- **Control Flow**: Shows the directional flow of control between nodes.
- **Decision Node**: Indicates a point where decisions are made.
- **Final Node**: Marks the end of an activity.
- **Fork**: Splits control into multiple parallel flows.
- **Merge**: Joins multiple flows into one.
- **Merge Node**: Similar to a merge, but as a node rather than a line.
- **Object**: Represents data or artifacts.
- **Start Node**: Marks the beginning of an activity.
- **Text**: General descriptive text not contained in nodes.

# Object Classes

## Action
### Description
Rounded rectangles that specify tasks within the diagram.
### Instructions
Identify rounded rectangles labeled with tasks or actions. Ensure the boxes encompass the entire text and shape. Do not include overlapping elements.

## Activity
### Description
Elongated ovals indicating process states within the diagram.
### Instructions
Locate elongated ovals labeled with activity states. Bound the entire oval, capturing all contained text. Exclude other shapes.

## Comment
### Description
Rectangles with a small triangular fold on one corner, used for annotations.
### Instructions
Annotate rectangles with corner folds, ensuring the fold and text are encompassed. Do not capture unrelated shapes or text bubbles.

## Control Flow
### Description
Solid arrows demonstrating direction between nodes.
### Instructions
Label solid arrows pointing from one node to another. Annotate from the arrow's start to the tip. Avoid labeling dashed lines or non-directional lines.

## Decision Node
### Description
Diamond shapes indicating decision points in the flow.
### Instructions
Draw around diamond shapes that represent decision points. Annotate the full diamond, including any text inside. Exclude non-diamond shapes.

## Final Node
### Description
Concentric circles often indicating end points in a diagram.
### Instructions
Capture concentric circles that denote end points. Encircle both the inner and outer rings. Avoid circles used for different purposes.

## Fork
### Description
Thick lines splitting control into parallel paths.
### Instructions
Identify thick, horizontal lines connected to multiple paths. Annotate the entire length, focusing on splits in direction. Exclude thinner lines.

## Merge
### Description
Thick lines joining multiple paths into one.
### Instructions
Annotate thick lines that merge multiple paths. Ensure the entire line is captured, denoting convergence, not separation.

## Merge Node
### Description
Diamond shapes for merging paths, distinctive from decision nodes.
### Instructions
Capture diamonds specifically used for path merging. Bound the full diamond, ensuring clarity and distinction from decision nodes.

## Object
### Description
Rectangles often representing data or artifacts.
### Instructions
Identify rectangles labeled with object names. Ensure full capture of the rectangle and text. Exclude nodes representing actions.

## Start Node
### Description
Filled circles marking starting points in the diagram.
### Instructions
Annotate filled circles marking the beginning of processes. Ensure the circle's entirety is captured, excluding circles for other uses.

## Text
### Description
General descriptions or titles within the diagram.
### Instructions
Label standalone text outside distinct nodes. Ensure full capture of the text area and exclude any associating shapes or lines.