| add_metadata | Add metadata to imported data |
| extract_metadata | Extract metadata for imported data |
| glc_collect | Collect compatible file groups |
| glc_datasets | Inventory datasets |
| glc_download | Download package metadata or data |
| glc_explore | Explore Global Light Commons data packages |
| glc_files | Inventory declared data files |
| glc_metadata | Load metadata resources |
| glc_open | Open a Global Light Commons data package |
| glc_packages | List registered Global Light Commons data packages |
| glc_read | Read metadata-described dataset files |
| glc_resources | Inventory data-package resources |
| glc_schema_versions | Report supported GLC schema versions |
| glc_search_metadata | Search metadata values or field paths |
| glc_search_packages | Search registered data packages |
| glc_summary | Summarize a Global Light Commons data package |
| glc_variables | Inventory and search declared variables |