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Update TARGETPATH and PATHPATTERN recommendations #67

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Dec 3, 2019
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Update TARGETPATH and PATHPATTERN recommendations #67

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17 changes: 12 additions & 5 deletions tuf-spec.md
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Expand Up @@ -806,9 +806,13 @@ repo](https://github.com/theupdateframework/specification/issues).
}

Each key of the TARGETS object is a TARGETPATH. A TARGETPATH is a path to
a file that is relative to a mirror's base URL of targets. It should not
have a leading path separator to avoid surprising behavior when constructing
paths on disk.
a file that is relative to a mirror's base URL of targets. To avoid
surprising behavior when resolving paths, it is RECOMMENDED that a
TARGETPATH uses the forward slash (/) as directory separator and does not
start with a directory separator. The recommendation for TARGETPATH aligns
with the ["path-relative-URL string"
definition](https://url.spec.whatwg.org/#path-relative-url-string) in the
WHATWG URL specification.

It is allowed to have a TARGETS object with no TARGETPATH elements. This
can be used to indicate that no target files are available.
Expand Down Expand Up @@ -881,8 +885,11 @@ repo](https://github.com/theupdateframework/specification/issues).
match file paths "targets/foo.tgz" and "targets/bar.tgz", but not
"targets/foo.txt". Likewise, path pattern "foo-version-?.tgz" matches
"foo-version-2.tgz" and "foo-version-a.tgz", but not "foo-version-alpha.tgz".
It should not have a leading path separator to avoid surprising behavior when
constructing paths on disk.
To avoid surprising behavior when matching targets with PATHPATTERN, it is
RECOMMENDED that PATHPATTERN uses the forward slash (/) as directory
separator and does not start with a directory separator, akin to
TARGETSPATH.


Prioritized delegations allow clients to resolve conflicts between delegated
roles that share responsibility for overlapping target paths. To resolve
Expand Down