1.2.3   REQ001

        Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod
        tempor incididunt ut labore et dolore magna aliqua.
        Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi
        ut
        aliquip ex ea commodo consequat.
        Duis aute irure dolor in reprehenderit in voluptate velit esse cillum
        dolore
        eu fugiat nulla pariatur.
        Excepteur sint occaecat cupidatat non proident, sunt in culpa qui
        officia
        deserunt mollit anim id est laborum.

        Links: SYS001, SYS002

1.4     REQ003

        Unicode: -40° ±1%

        Reference: external/text.txt (line 3)

        Links: REQ001

1.5     REQ006

        Hello, world!

        Reference: external/text.txt (line 3), external/text2.txt

        Links: REQ001

1.6     REQ004

        Hello, world!

2.1     REQ002 Plantuml

        Hello, world!

        ```plantuml format="svg_inline" alt="Use Cases of Doorstop" title="Use
        Cases of Doorstop"
        @startuml
        Author --> (Create Document)
        Author --> (Create Item)
        Author --> (Link Item to Document)
        Author --> (Link Item to other Item)
        Author --> (Edit Item)
        Author --> (Review Item)
        Author -> (Delete Item)
        Author -> (Delete Document)
        (Export) <- (Author)
        (Import) <- (Author)
        Reviewer --> (Review Item)
        System --> (Suspect Changes)
        System --> (Integrity)
        @enduml
        ```

2.1     REQ2-001

        Hello, world!

        Test Math Expressions in Latex Style:

        Inline Style 1: $a \ne 0$
        Inline Style 2: \(ax^2 + bx + c = 0\)
        Multiline: $$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$

        Links: REQ001

