Core PDML Railroad Diagrams

The following railroad diagrams illustrate PDML's grammar.

Only Core PDML is covered. Optional extensions like attributes, namespaces etc. are not included.

The railroad diagrams are not a specification. They are just an auxiliary asset to contextualize the official specification.

The grammar is also illustrated as EBNF.

Notes:

• Rectangles (e.g. ) represent non-terminal elements. You can click on them to go to their definition.
• Rounded rectangles (e.g. ) represent characters to type.
• Thanks to Tab Atkins for his excellent Railroad-diagram Generator, used to generate these diagrams.

PDML Document

Branch Node

Non-empty Node

Examples:

[color orange]
[config [color orange]]
[div A [i [b nice]] dog]

Empty Node

Example:

[line_break]

Name

Examples:

height
Index_12-a.2
_
👆👆
品質
Net\sWeight

Name Character

Examples:

a
Z
é
品
9
_
👆
\=

Separator

Child Node

Examples:

[b [i huge]]
All is well!

Leaf Node

Examples:

Bob
3.14
We want simplicity.
ขอให้คุณโชคดี
root\\config\["port"\]

Text Character

Examples:

a
Z
é
ก
9
_
😀
\[
\n