如何解释术语基数?
提供的 SRS 文档描述了最终产品、系统维护工具的各个方面。我唯一无法理解的段落是“组件基数”。在这种情况下这个术语意味着什么?
该表如下所示:
Component Cardinality
=========================
Trigger | 1..* | 1..*
Input | 1..1 | 1..*
Transform | 1..* | 1..1
另一张:
Component | Configuration | Cardinality
=======================================
Trigger | Schedule | 1
| Recurrence | 1
| Condition | 0..*
请帮助正确解释这一点。非常感谢
An SRS document is provided describing various aspects of the end-product, system maintenance tool. The only paragraph I'm failing to understand is "Component Cardinality". What does this term mean in such context?
The table looks like this:
Component Cardinality
=========================
Trigger | 1..* | 1..*
Input | 1..1 | 1..*
Transform | 1..* | 1..1
And the other one:
Component | Configuration | Cardinality
=======================================
Trigger | Schedule | 1
| Recurrence | 1
| Condition | 0..*
Please help to interpret this properly. Many thanks
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基数通常是指关系以及特定实体与另一个实体相关的数量。这两个表可能涉及输入/输出。
例如:
其中每一个都表示 1-1(一个实体到一个实体的关系)、1-*(一个实体到多个实体的关系)。
第二个图表似乎具体说明了有关单个组件的更多细节,并指示了可能的“触发器类型”。也许会出现单个计划触发器(基数为 1),单个重复触发器(也是基数为 1),并且 0 -N 条件触发器可能存在于系统中(从 0-* 基数),
这相当盲目,但我希望它可能会有所帮助。
Cardinality typically refers to relationships and how many of a specific entity relate to another entity. The two tables might refer to input / output.
For example:
Each of those indicating a 1-1 (One entity to One entity relationship), 1-* (One entity to many entities relationship).
The second chart seems to specific more details regarding a single component and indicating possible "types of Triggers. Perhaps that a single Schedule Trigger will be present (By cardinality 1), as will a single Recurrence Trigger (Also cardinality 1), and that 0-N Condition Triggers may be present in the system (From 0-* cardinality).
This is rather a shot in the dark but I hope it might help some.