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Generic Syntax for URI (RFC 3986) — URI Path

Section 3.3

path =
path‑abempty /  ; begins with "/" or is empty
path‑absolute /  ; begins with "/" but not "//"
path‑noscheme /  ; begins with a non‑colon segment
path‑rootless /  ; begins with a segment
path‑empty  ; zero characters
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path-abempty =
*( "/"  segment )
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path-absolute =
"/"  [  segment‑nz  *( "/"  segment ) ]
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path-noscheme =
segment‑nz‑nc  *( "/"  segment )
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path-rootless =
segment‑nz  *( "/"  segment )
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path-empty =
0<pchar>
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segment =
*pchar
segment-nz =
1*pchar
segment-nz-nc =
1*( unreserved /  pct‑encoded /  sub‑delims /  "@" )
; non-zero-length segment without any colon ":"
pchar =
unreserved /  pct‑encoded /  sub‑delims /  ":" /  "@"

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