I used the `org.openjfx:javafx-archetype-simple` Maven archetype to start my first JavaFX project. 

The resulting POM:

```xml
<project xmlns = "http://maven.apache.org/POM/4.0.0"
         xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation = "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.example.invoicing</groupId>
    <artifactId>Invoicer</artifactId>
    <version>1.0-SNAPSHOT</version>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>14</maven.compiler.source>
        <maven.compiler.target>14</maven.compiler.target>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-controls</artifactId>
            <version>14</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <release>14</release>   ???
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.openjfx</groupId>
                <artifactId>javafx-maven-plugin</artifactId>
                <version>0.0.4</version>
                <configuration>
                    <mainClass>com.example.invoicing.App</mainClass>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

```

➥ What is the purpose of the `<release>14</release>` line in `<configuration>` for the plugin `<artifactId>maven-compiler-plugin</artifactId>`? 

I found this documentation for the Maven Compiler Plugin, [*Compiling Your Java Sources*](https://maven.apache.org/plugins/maven-compiler-plugin/usage.html). But it only mentions `<!-- put your configurations here -->`. So I do not know anything about specific configuration options here.

Is `<release>14</release>` the version of Java being used to compile? Is it the version of OpenJFX? Something else? 

I tried using `28` arbitrarily. Doing a Maven > `install` threw this error with an unhelpful error message with no clue as to a release of what product:

> 
> Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project Invoicer: Fatal error compiling
> 
> 
>