design: Remove requirement for magic bytes in PDL file
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@ -43,7 +43,6 @@ structures. They are separated by whitespace.
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| Name | Syntax | Description
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| -------- | ------------------ | -----------
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| Magic | `PDL/0` | Must appear at the very start of the file.
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| Method | `M[0-9A-Fa-f]{4}` | A 16-bit hexadecimal method code.
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| Key | `[0-9A-Fa-f]{4}` | A 16-bit hexadecimal table key.
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| Ident | `[A-Z][A-Za-z0-9]` | An identifier.
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@ -55,8 +54,6 @@ structures. They are separated by whitespace.
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## Syntax
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All files must begin with a Magic token.
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Types are expressed with an Ident. A table can be used by either writing the
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name of the type (Table), or by defining a schema with curly braces. Arrays must
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be expressed using two matching square brackets before their element type.
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@ -73,8 +70,6 @@ can be anything.
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Here is an example of all that:
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```
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PDL/0
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M0000 Connect {
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0000 Name String,
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0001 Password String,
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@ -96,8 +91,7 @@ User {
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Below is an EBNF description of the language.
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```
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<file> -> <magic> (<message> | <typedef)*
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<magic> -> "PDL/0"
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<file> -> (<message> | <typedef)*
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<method> -> /M[0-9A-Fa-f]{4}/
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<key> -> /[0-9A-Fa-f]{4}/
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<ident> -> /[A-Z][A-Za-z0-9]/
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