Clarify whether or not system query options can be used more than once in a URL

Proposal 1: Don't allow any system query options to be used more than once Proposal 2: Allow multiple $select where the resultant projection is the union of all the individual $selects. Allow multiple $expand where the resultant expanded relationships is the union of all the individual $expands. Allow multiple $filter where the resultant query is all the individual $filters composed with AND (and combined with all $searches) Allow multiple $search where the resultant query is the individual $searches composed with AND (and combined with all $filters) All other system query options cannot be used multiple times Proposal 3: Continuing from proposal 2, also allow $orderby, $top and $skip to be used more than once: $top and $skip, add the numbers together Allow multiple $orderby where the resultant order by is the union of all the individual $orderbys where the $orderbys that appear earlier in the URL are given higher sort priority. Proposal 1 is certainly the simplest. Proposal 2 and 3 allow a more flexible request URL but they do not add any functionality that cannot be accomplished with proposal 1. Proposal 1 was accepted: https://www.oasis-open.org/apps/org/workgroup/odata/download.php/51209/odata-meeting-58_on-20131024-minutes.html#odata-555

https://www.oasis-open.org/committees/download.php/51284/odata-v4.0-wd05-part1-protocol-2013-11-04.docx https://www.oasis-open.org/committees/download.php/51285/odata-v4.0-wd05-part2-url-conventions-2013-11-04.docx Accepted: https://www.oasis-open.org/committees/download.php/51290/odata-meeting-60_on-20131104-minutes.html#odata-555