Home A - Z
Page Index

An Otter Wiki

Blame

20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
1 
> **DRAFT** — under teacher review.
2
3
# Essential Terms — C02
4
1abe81 lisa 2026-04-30 18:17:38
School name → 'The Hamilton and Alexandra College' across all wiki pages Sweep rename of the standard subtitle line on every wiki page (sd/, hub, resources). 25 files affected.
5
The Hamilton and Alexandra College · Year 12 · 2026
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
6
7
A glossary of every term you need to recognise and use correctly across C02. Click a term to expand its definition. Use this as a vocabulary self-check before your C2-1 (Poster Peer-Assessment) and C2-2 (Hand-Drawn Diagrams) validations — if you can't define a term in your own words, you can't defend it under questioning.
8
9
---
10
11
## Topics covered
12
d8d977 lisa 2026-04-28 16:26:33
Essential Terms: split glossary into Data Collection + Analytical Tools Two H2 sections so students can study by focus area (C2-1 data collection vs C2-2 diagrams). Same folded-block format throughout. 9 terms in Data Collection, 17 in Analytical Tools.
13
- **Data collection** — interviews, surveys, observations, reports; qualitative vs quantitative data
14
- **Analytical tools** — context diagrams, data flow diagrams, use case diagrams
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
15
16
---
17
d8d977 lisa 2026-04-28 16:26:33
Essential Terms: split glossary into Data Collection + Analytical Tools Two H2 sections so students can study by focus area (C2-1 data collection vs C2-2 diagrams). Same folded-block format throughout. 9 terms in Data Collection, 17 in Analytical Tools.
18
## Data Collection
19
20
>| ### Close-ended questions
21
>| Questions that can be answered with a finite set of responses
22
23
>| ### Data
24
>| Raw, unprocessed facts and figures
25
26
>| ### Interview
27
>| A face-to-face meeting between people for consultative purposes
28
29
>| ### Observation
30
>| A method of data collection that involves physically observing how a system operates and how it is used
31
32
>| ### Open-ended questions
33
>| Questions where the number of potential answers is infinite
34
35
>| ### Qualitative data
36
>| Data that consists of descriptive details, usually gathered via surveys or interviews
37
38
>| ### Quantitative data
39
>| Data that can be easily processed in a statistical manner, usually composed of definite numbers
40
41
>| ### Report
42
>| A written document providing a summary or finding in relation to the context or system being analysed
43
44
>| ### Survey
45
>| A set of questions that ask for a response to be selected from a list of alternatives
46
47
---
48
49
## Analytical Tools
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
50
f48b63 lisa 2026-04-27 20:03:58
Essential Terms: switch Obsidian callouts to OtterWiki folded blocks Obsidian's '> [!note]- Term' syntax was rendering as plain blockquotes on OtterWiki. Converted all 26 entries to '>| ### Term' folded-block syntax (per OtterWiki syntax guide), so each term is a click-to-expand summary with the definition revealed below.
51
>| ### Actor
52
>| An entity that can interact with the software solution as shown in a use case diagram
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
53
f48b63 lisa 2026-04-27 20:03:58
Essential Terms: switch Obsidian callouts to OtterWiki folded blocks Obsidian's '> [!note]- Term' syntax was rendering as plain blockquotes on OtterWiki. Converted all 26 entries to '>| ### Term' folded-block syntax (per OtterWiki syntax guide), so each term is a click-to-expand summary with the definition revealed below.
54
>| ### Association
55
>| A relationship between two elements in a use case diagram
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
56
f48b63 lisa 2026-04-27 20:03:58
Essential Terms: switch Obsidian callouts to OtterWiki folded blocks Obsidian's '> [!note]- Term' syntax was rendering as plain blockquotes on OtterWiki. Converted all 26 entries to '>| ### Term' folded-block syntax (per OtterWiki syntax guide), so each term is a click-to-expand summary with the definition revealed below.
57
>| ### Context diagram
58
>| A visualisation of a system in its entirety that indicates the data that is passed into and out of the system
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
59
f48b63 lisa 2026-04-27 20:03:58
Essential Terms: switch Obsidian callouts to OtterWiki folded blocks Obsidian's '> [!note]- Term' syntax was rendering as plain blockquotes on OtterWiki. Converted all 26 entries to '>| ### Term' folded-block syntax (per OtterWiki syntax guide), so each term is a click-to-expand summary with the definition revealed below.
60
>| ### Data flow
61
>| The movement of a piece or collection of data within an information system, as shown in context diagrams and data flow diagrams (DFDs)
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
62
f48b63 lisa 2026-04-27 20:03:58
Essential Terms: switch Obsidian callouts to OtterWiki folded blocks Obsidian's '> [!note]- Term' syntax was rendering as plain blockquotes on OtterWiki. Converted all 26 entries to '>| ### Term' folded-block syntax (per OtterWiki syntax guide), so each term is a click-to-expand summary with the definition revealed below.
63
>| ### Data flow diagram (DFD)
64
>| A graphical visualisation of the flow of information within a system, including data provided by external entities
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
65
f48b63 lisa 2026-04-27 20:03:58
Essential Terms: switch Obsidian callouts to OtterWiki folded blocks Obsidian's '> [!note]- Term' syntax was rendering as plain blockquotes on OtterWiki. Converted all 26 entries to '>| ### Term' folded-block syntax (per OtterWiki syntax guide), so each term is a click-to-expand summary with the definition revealed below.
66
>| ### Data store
67
>| A representation of a collection of data that is stored in some way within a system
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
68
f48b63 lisa 2026-04-27 20:03:58
Essential Terms: switch Obsidian callouts to OtterWiki folded blocks Obsidian's '> [!note]- Term' syntax was rendering as plain blockquotes on OtterWiki. Converted all 26 entries to '>| ### Term' folded-block syntax (per OtterWiki syntax guide), so each term is a click-to-expand summary with the definition revealed below.
69
>| ### Entity
70
>| The users or external systems that interact with the system being created
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
71
f48b63 lisa 2026-04-27 20:03:58
Essential Terms: switch Obsidian callouts to OtterWiki folded blocks Obsidian's '> [!note]- Term' syntax was rendering as plain blockquotes on OtterWiki. Converted all 26 entries to '>| ### Term' folded-block syntax (per OtterWiki syntax guide), so each term is a click-to-expand summary with the definition revealed below.
72
>| ### Extend
73
>| A relationship between use cases where one use case has optional or additional functionality, which is represented in a use case diagram as a second use case
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
74
f48b63 lisa 2026-04-27 20:03:58
Essential Terms: switch Obsidian callouts to OtterWiki folded blocks Obsidian's '> [!note]- Term' syntax was rendering as plain blockquotes on OtterWiki. Converted all 26 entries to '>| ### Term' folded-block syntax (per OtterWiki syntax guide), so each term is a click-to-expand summary with the definition revealed below.
75
>| ### Generalisation
76
>| A parent-child relationship between two elements in a use case diagram
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
77
f48b63 lisa 2026-04-27 20:03:58
Essential Terms: switch Obsidian callouts to OtterWiki folded blocks Obsidian's '> [!note]- Term' syntax was rendering as plain blockquotes on OtterWiki. Converted all 26 entries to '>| ### Term' folded-block syntax (per OtterWiki syntax guide), so each term is a click-to-expand summary with the definition revealed below.
78
>| ### Include
79
>| A relationship between use cases where one use case is tied to, or relies upon, the functionality contained within another use case
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
80
f48b63 lisa 2026-04-27 20:03:58
Essential Terms: switch Obsidian callouts to OtterWiki folded blocks Obsidian's '> [!note]- Term' syntax was rendering as plain blockquotes on OtterWiki. Converted all 26 entries to '>| ### Term' folded-block syntax (per OtterWiki syntax guide), so each term is a click-to-expand summary with the definition revealed below.
81
>| ### Process (context diagram)
82
>| An abstract representation of the whole system being created
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
83
f48b63 lisa 2026-04-27 20:03:58
Essential Terms: switch Obsidian callouts to OtterWiki folded blocks Obsidian's '> [!note]- Term' syntax was rendering as plain blockquotes on OtterWiki. Converted all 26 entries to '>| ### Term' folded-block syntax (per OtterWiki syntax guide), so each term is a click-to-expand summary with the definition revealed below.
84
>| ### Process (data flow diagram)
85
>| An abstract representation of a function within a system
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
86
f48b63 lisa 2026-04-27 20:03:58
Essential Terms: switch Obsidian callouts to OtterWiki folded blocks Obsidian's '> [!note]- Term' syntax was rendering as plain blockquotes on OtterWiki. Converted all 26 entries to '>| ### Term' folded-block syntax (per OtterWiki syntax guide), so each term is a click-to-expand summary with the definition revealed below.
87
>| ### Relationship
88
>| The connections between elements within a use case diagram
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
89
f48b63 lisa 2026-04-27 20:03:58
Essential Terms: switch Obsidian callouts to OtterWiki folded blocks Obsidian's '> [!note]- Term' syntax was rendering as plain blockquotes on OtterWiki. Converted all 26 entries to '>| ### Term' folded-block syntax (per OtterWiki syntax guide), so each term is a click-to-expand summary with the definition revealed below.
90
>| ### System boundary
91
>| A rectangle around relevant use cases that indicates the use cases that are within the scope of the solution
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
92
f48b63 lisa 2026-04-27 20:03:58
Essential Terms: switch Obsidian callouts to OtterWiki folded blocks Obsidian's '> [!note]- Term' syntax was rendering as plain blockquotes on OtterWiki. Converted all 26 entries to '>| ### Term' folded-block syntax (per OtterWiki syntax guide), so each term is a click-to-expand summary with the definition revealed below.
93
>| ### Unified Modeling Language (UML)
94
>| A general-purpose visual modelling language
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
95
f48b63 lisa 2026-04-27 20:03:58
Essential Terms: switch Obsidian callouts to OtterWiki folded blocks Obsidian's '> [!note]- Term' syntax was rendering as plain blockquotes on OtterWiki. Converted all 26 entries to '>| ### Term' folded-block syntax (per OtterWiki syntax guide), so each term is a click-to-expand summary with the definition revealed below.
96
>| ### Use case
97
>| A representation of the transactions or functions a user (actor) can complete in a system, as shown in a use case diagram
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
98
f48b63 lisa 2026-04-27 20:03:58
Essential Terms: switch Obsidian callouts to OtterWiki folded blocks Obsidian's '> [!note]- Term' syntax was rendering as plain blockquotes on OtterWiki. Converted all 26 entries to '>| ### Term' folded-block syntax (per OtterWiki syntax guide), so each term is a click-to-expand summary with the definition revealed below.
99
>| ### Use case diagram (UCD)
100
>| A method of describing how a user interacts with a system, using Unified Modeling Language (UML)
20e3bf lisa 2026-04-27 20:00:52
Add C02 Essential Terms glossary Verbatim from C02-essential-terms.md (25 terms covering data collection, context/data-flow/use-case diagrams, qual/quant). House-style header + topics index + see-also footer added.
101
102
---
103
104
## See also
105
106
- [Context Diagram](Context%20Diagram.md) — the highest-level view of your system
107
- [Context Diagram vs Data Flow Diagram](Context%20Diagram%20vs%20Data%20Flow%20Diagram.md) — what changes between Level 0 and Level 1
108
- [What Is an Entity](What%20Is%20an%20Entity.md) — entities aren't only people
109
- [Excalidraw Diagram Starters](Excalidraw%20Diagram%20Starters.md) — pre-framed canvases for rehearsing all three diagrams