Closed slanden closed 2 years ago
an element name cannot contain hyphens (-)
This is actually a mistake in the article. Thanks for pointing this out. I have fixed it. It now states:
"an element name cannot start with a hyphen (-)"
Does this mean hyphens aren't allowed in the middle of names either?
They are allowed in the middle of names. They are just not allowed as a first character of a name.
The official PDML specification states:
"A node name must match the regex [a-zA-Z_][a-zA-Z0-9_\.-]*
. This means that a name starts with a letter or an underscore (_
), optionally followed by any number of letters, digits, underscores (_
), hyphens (-
), or dots (.
)."
How does this come into play in PDML, especially if used as an alternative to write Web documents?
The PDML/PML rule for names is the same as the rule in XML/HTML (see chapter 'XML Naming Rules'):
XML elements must follow these naming rules:
- Element names are case-sensitive
- Element names must start with a letter or underscore
- Element names cannot start with the letters xml (or XML, or Xml, etc)
- Element names can contain letters, digits, hyphens, underscores, and periods
- Element names cannot contain spaces
The article Suggestion For a Better XML/HTML Syntax states in the section titled Comments
Does this mean hyphens aren't allowed in the middle of names either?
Today's HTML component authors must use multi-word names separated by hyphens to not conflict with any official HTML single-word element, existing or not.
How does this come into play in PDML, especially if used as an alternative to write Web documents?