Allow applying actions to a filtered collection of entities

Add a $filter path segment that specifies a Boolean expression, where the expression is specified through a query parameter: POST Products/$filter=@filter/Special.Discount?@filter=Age gt 3 This can be used in conjunction with an action, a data modification statement, or any other statement. This follows the existing semantics that, if the segment following a collection matches an OData segment, that segment takes precedence over a possible key value in key-as-segment.

https://www.oasis-open.org/committees/download.php/60367/odata-v4.01-wd02-part2-url-conventions-2017-03-24.docx https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/4.01%20spec/ABNF/odata-abnf-construction-rules.txt?op=diff&rev=1019 https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/4.01%20spec/ABNF/odata-abnf-testcases.xml?op=diff&rev=1019