docs: clarify namespace in ABNF

[jkowalleck]

i found the docs confusing.

in the current ABNF it reads

property-name = 1*(namespace ":") name
; ...

the problem i saw: the namespace is used multiple time, so if i registered a namespace, how would i use it multiple times?

Here is a fix.

[jkowalleck]

syntax hilight - preview https://github.com/CycloneDX/cyclonedx-property-taxonomy/blob/8c9ef8f57a471aa23933badf4eacece5b6ce7e6c/README.md

[jkowalleck]

Alternative writing would be :

name =  1*namechar
name =/ name ":" name

[coderpatros]

i found the docs confusing.

in the current ABNF it reads

property-name = 1*(namespace ":") name
; ...

the problem i saw: the namespace is used multiple time, so if i registered a namespace, how would i use it multiple times?

Here is a fix.

Maybe it should be reworded instead? Instead of namespace maybe namespace-segment? The current syntax is to differentiate between namespaces, sub-namespaces, and the name of the property within the namespace. Thoughts?

[jkowalleck]

re: #48 (comment)

then why not call these things exactly like that? how do you like te following?

property-name =  name
property-name =/ namespace ":" 1*(sub-namespace ":") name

namespace = 1*namechar
sub-namespaces = 1*namechar
name = 1*namechar

; ...