rbygrave commented on issue #11500:
URL: https://github.com/apache/maven/issues/11500#issuecomment-3767388862
Given that `groupId` `artifactId` and `version` can be combined with a colon
delimiter. We can compare and contrast using gav as 3 attributes `groupId,
artifactId, version` vs a combined `id` attribute.
### Examples for comparison
#### Option A - separate `groupId, artifactId, version` attributes
```xml
<dependency groupId="org.slf4j" artifactId="slf4j-api" version="2.0.17"/>
<dependency groupId="org.postgresql" artifactId="postgresql"
version="42.7.3"/>
<!-- an annotation processor -->
<dependency groupId="io.ebean" artifactId="querybean-generator"
version="17.2.0" type="processor" scope="provided"/>
<!-- test dependencies -->
<dependency groupId="org.junit.jupiter" artifactId="junit-jupiter-api"
version="5.14.1" scope="test"/>
<dependency groupId="org.assertj" artifactId="assertj-core" version="3.27.6"
scope="test"/>
...
```
#### Option B - combined `id` attribute (for gav)
```xml
<dependency id="org.slf4j:slf4j-api:2.0.17"/>
<dependency id="org.postgresql:postgresql:42.7.3"/>
<!-- an annotation processor -->
<dependency id="io.ebean:querybean-generator:17.2.0" type="processor"
scope="provided"/>
<!-- test dependencies -->
<dependency id="org.junit.jupiter:junit-jupiter-api:5.14.1" scope="test"/>
<dependency id="org.assertj:assertj-core:3.27.6" scope="test"/>
...
```
--------
So with the combined `id` attribute, it could look like:
```xml
<dependency id="${groupId}:${artifactId}:${version}"
type="..."
classifier="..."
scope="..."
optional="..."
> <!-- new attributes -->
<groupId/> <!-- existing elements -->
<artifactId/>
<type/>
<classifier/>
<scope/>
<systemPath/>
<exclusions>
<exclusion id="${groupId}:${artifactId}"> <!-- new attribute -->
<groupId/> <!-- existing exclusion elements -->
<artifactId/>
</exclusion>
</exclusions>
<optional/>
</dependency>
```
A potential issue with the `id` is that on the dependency element it's a
groupId + artifactId + version but on the exclusion it's only a groupId +
artifactId [no version expected / needed].
##### Example exclusion
```xml
<dependency groupId="org.postgresql" artifactId="postgresql"
version="42.7.3">
<exclusions>
<exclusion groupId="*" artifactId="*"/>
</exclusions>
</dependency>
```
```xml
<dependency id="org.postgresql:postgresql:42.7.3">
<exclusions>
<exclusion id="*:*"/>
</exclusions>
</dependency>
```
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