DC Requested Features - Hyrax vs. Hyku comparison

Feature	Must Have/Nice to Have	Hyku	Hyrax	Comments

Feature	Must Have/Nice to Have	Hyku	Hyrax	Comments
Granular permissions/roles - MI and IT need admin access, curatorial departments need access to their content regardless of visibility, other OSUL staff, e.g. Copyright Services, also need access to content regardless of visibility (FLOW-3449 and FLOW-3450)	Must have	Yes 3 roles: Administrator, Manager, and Depositor for each tenant Super Administrator for the entire repository	Yes	DC currently has customized permissions that were initiated due to limitations with Samvera Sufia. If DC gets Hyrax upgrade, those customizations should be removed.
Collections as objects (FLOW-912)	Must have	Yes	Yes	Most admin sets require hierarchical arrangement that mirrors the finding aid and providing collection’s context. BICLM would prefer to not use collections as objects. Some works not associated with a collection would need an artificial collection.
Add administrative sets (FLOW-2654)	Must have	Yes	Yes	Hilandar’s content has been waiting for years. This blockage reflects the customized permissions and DC landing page rather than actual capabilities in both Samvera platforms.
Multi-tenancy	Nice to have	Yes	No
Advanced Search (FLOW-1609)	Must have	No? - Need to see if hosted solutions, e.g. HykuUP provide that as an add-on	Yes, with Blacklight	Blacklight used for several apps. As of April 2023, there are discussions in the Samvera community about whether the Advanced Search capability with Blacklight will be deprecated.
Add metadata fields (existing functionality)	Must have	Yes with developer work	Yes with developer work	DC already uses additional Dublin Core fields not supported “out-of-the-box” and custom metadata fields. There is interest in the Hyku community to implement/incorporate Project Surfliner which could be a game changer for this.
Customize facets (FLOW-1664 and FLOW-2647)	Must have	Yes with developer work	Yes with developer work	Need to add and remove facets as necessary
Customize metadata labels (existing functionality)	Must have	Yes with developer work	Yes with developer work	See above
Support for linked data controlled vocabularies (FLOW-3398)	Nice to have	Yes?	Yes, with Questioning Authority gem	MI is requesting this capability which is commonly used in Hyrax repositories. Curatorial units are lukewarm about it. However, MI believes it could support mediated deposit workflows in the future. Another consideration is DC metadata that would require remediation before implementing this gem.
PDF viewing through IIIF Viewer (FLOW-3393)	Must have	Yes with developer work?	Yes with developer work	SoftServ has made progress in this area.
Sorting records customization (FLOW-3392)	Nice to have?	?	?	The default sorting criteria is not helpful. This is an issue in the Samvera community (Sorting a collection by relevance doesn't make much sense · Issue #4308 · samvera/hyrax and Add more sort options to search results page · Issue #3558 · samvera/hyrax). Patrons have complained about this.
Full record display redesign (FLOW-2035)	Must have?	?	Yes with developer work	At the least, it’s necessary to undo the two-column layout that was customized. The current ordering of fields is not intuitive. The default layout may or may not be suitable.
Brief record display - Redesign & functionality	Must have	?	Yes with developer work	Goal is to include more fields in brief record display based on various scenarios, e.g. different date types
Redesign work creation/edit form (FLOW-1667 and FLOW-3448)	Must have	?	Yes with developer work	This would support mediated deposit. MI already knows the data entry requirements for each field.
Conversion of EDTF dates (FLOW-3206)	Must have	No?	Yes with developer work	See Duke and Emory for examples, also Support for EDTF dates · Issue #5079 · samvera/hyrax
Searching for date by timeline in facet (FLOW-3391)	Must have	No?	Yes with customization in Blacklight facets	See Duke and Emory for examples
Ordering of values in specific fields	Nice to have	Yes, with developer work?	Yes, with OrderAlready gem	In RDF, there is no ordering of values. That is a known problem in the Samvera community. For specific fields, e.g. creator, the ordering of values has meaning.
Customize OAI harvesting (FLOW-3400 and FLOW-3207)	Must have	Yes, but not customizable	Yes, with Blacklight OAI provider. Customized in DC to include thumbnails for DPLA.	This capability currently exists in DC and has been customized. Resumption token button not working. Hyku Roadmap (Future Work) refers to the available fields and mappings as fixed; the goal is to allow them to be renamed and configured. Would like to revise OAI mappings for Qualified Dublin Core to support OAI harvest by BTAA Geoportal.
Batch/bulk import	Must have	Bulkrax enabled by default	Bulkrax can be configured as add-on	Using locally created tool. Bulkrax has more sophisticated options with error checking.
Improved reporting on batch import failures and issues (FLOW-2080)	Nice to have?	Bulkrax enabled by default	Bulkrax can be configured as add-on	Using locally created tool. Bulkrax has more sophisticated options with error checking.
Batch/bulk update	Must have	Bulkrax enabled by default	Bulkrax can be configured as add-on	Using locally created tool. Bulkrax has more sophisticated options with error checking.
Breadcrumbs	Nice to have	?	?	DSpace used as an example
GIS support	Nice to have	No?	Yes?, with GeoBlacklight
Suppress IIIF Image Viewer for specific records or units (FLOW-3522)	Must have? - Due to copyright issues	Yes with developer work	Yes with developer work	Requested by BICLM. University of Louisville’s Hyku repository has customized IIIF Viewer download options. Atla Digital Library has custom options in Hyrax work edit form to turn off IIIF Viewer as needed.
Suppress AV file downloads from IIIF Viewer (FLOW-1998)	Must have	Yes with developer work?	Yes with developer work	There was prior agreement to restrict download of AV files. Some curators would prefer mediated access for patrons through the single-use link.
Mediated deposit (FLOW-3389)	Nice to have	Yes	Yes	Out-of-the-box functionality that doesn’t work in DC
File versioning (FLOW-3396 and FLOW-3446)	Must have	Yes	Yes	Out-of-the-box functionality that doesn’t work in DC
Single-use link to file for patrons (FLOW-3440)	Must have	Yes	Yes	Out-of-the-box functionality that doesn’t work in DC
Reporting (FLOW-3390 and FLOW-3442)	Must have	Yes	Yes	Out-of-the-box functionality that doesn’t work in DC
Administrative and structural metadata is stored and displayed correctly (FLOW-2102, FLOW-3438, and FLOW-3504)	Must have	Yes	Yes	Maintenance issue?
Technical metadata and file characterization is stored and displayed correctly (FLOW-3445, FLOW-3497, FLOW-2318, and FLOW-3445)	Must have	Yes	Yes	Maintenance issue?
Parent/child records - Ability for parent record to “adopt” existing records as children (FLOW-2256)	Must have	?	Yes	Out-of-the-box functionality that doesn’t work in DC
Indexed terms display with correct capitalization in Facets (FLOW-2151)	Nice to have	?	?	This may be an issue with Blacklight
Capacity to ingest works that have 300+ files (FLOW-3439)	Must have	?	?	This may be a limitation with Active Fedora. Valkyrie may resolve this issue in the future.
Capacity to rearrange files and parent/child records in works with a larger number of files (FLOW-3415 and FLOW-3444)	Must have	?	?	DC currently has issues with works of larger scale both in terms of batch ingest and file-level management.
Download of all file-level metadata in SOLR (FLOW-3495)	Nice to have	?	Yes with developer work?	AD&O created a data dump download for DC. However, it is only on the work-level. MI currently uses a Python web scraper to collection file-level metadata for its QR process.
Patrons can download files and metadata	Nice to have	Yes with developer work?	Yes with developer work	THO Special Collections suggested this. Anna showed an example from the Lafayette Digital Repository (Samvera Hyrax) as an example.
Pull records/files into digital exhibits	Nice to have	Yes with IIIF Manifest	Yes with IIIF Manifest	There are multiple digital exhibit platforms that support pulling DC files into them through the IIIF Viewer. There are also some options for pulling Fedora content, as well, into digital exhibits.