Expressive grouping for language integrated queries

Standard group operators afford expressive grouping across collections of various types for employment by a number of programming languages. The operators can leverage positional information to facilitate grouping of sequential/ordered input data. Groups can also include more than one input element. Additionally or alternatively, the operators can enable multi-level grouping such as nested or hierarchical grouping. In accordance with one aspect, the group operators can be employed in conjunction with language-integrated queries.