LSH Local Subject Headings are a 690 tag and are seen in all catalogs. It is used for locally-created subject headings (not Sears or LOC created) that are general enough for all catalogs, for example Follett Shelf ebooks, or Nonfiction.
At East we are using a variety of Local Subject Headings at Primary and at Secondary.
These are predominantly used for fiction picture books and are identified by a local subject heading at 690.
These are preceded by:
LSH - CASEL - XXXX
LSH - Alternative families (example)
LSH - XXXXXcultural
or UWCSEA (for PSE and profile subjects)
All books will have the tag 690 (LSH) for:
Fiction
Nonfiction