What to use when – metadata, content types, folders or document sets

Most end-users will be familiar with using folders to ‘categorise’ content in SharePoint document libraries, but not everyone will be familiar with other options including document sets or the use of metadata or content types to achieve similar ‘grouping’ outcomes.

Any (and all of) these options can be used to categorise content in a document library. But, aside from the default folder option, some thought should be given to the actual purpose and the end-user experience for the other three options.

This post provides some suggestions for what to use when.

In summary:

• Use folders most of the time, but try to limit them (through end-user communication) to no more than two levels. Any more and it may be better to create a new library.
• Use document sets where there is a (genuine) need to group documents with additional metadata and security controls. In some cases, metadata may be a better option.
• Use content types (including document sets) sparingly and for specific business requirements, not just to categorise document types in a single library when a metadata choice, naming conventions, or separate libraries may provide a better outcome.
• Use metadata columns when it makes sense to display content grouped and filtered by that metadata.

Document libraries are logical aggregations for records

As a starting point, keep in mind that SharePoint document libraries are logical aggregations or ‘containers’ for records.

When a SharePoint site is mapped to a business function, the libraries in that site can be mapped to or named after the activities that produce records.

It is generally not a good idea, from a recordkeeping point of view, to mix records created by different business activities (which is not uncommon in the default ‘Documents’ SharePoint library, especially the site attached to a Team in MS Teams).

Access controls and records retention are much harder to manage in single libraries that contain records created from multiple different business activities.

As the library is the logical container, any option use to categorize or break up content in a library – whether it be metadata, content types, folders or documents sets – is similar to a divider in a lever-arch folder. Ideally, the entire content of the document library should contain records about the same subject.

Metadata

Content in a document library can be categorized using metadata.

SharePoint sites have more or less unlimited metadata that can be applied to content in document libraries. All document libraries include the default ‘Name’ and ‘Title’ metadata fields as well as system generated metadata.

SharePoint also includes the Managed Metadata Service (MMS) that allows for the creation of a centralised set of hierarchical metadata terms, based on taxonomies and thesauri, accessible to all sites.

Microsoft announced in April 2020 that it was modernizing the SharePoint Managed Metadata Service (MMS) and that the updates ‘will be essential to delivering new premium value to Project Cortex later this year’ (2020).

To add metadata to a document library, it must be either (a) added via a content type that contains one or more site columns, or (b) created as a ‘local’ library column. Both of these options can link to the MMS.

Once the metadata has been added, documents may be grouped in a view by the metadata. In the example below, they are grouped by the choice metadata column ‘Document Type’.

The benefits with using metadata include:

• Ability to draw on the global terms defined in the MMS.
• Ability to group and filter content, especially useful in libraries with a lot of content. Note that certain columns, including those that use MMS terms, cannot be grouped.
• Supports multiple pre-defined views that can replace search (especially useful since ‘faceted’ searching was deprecated).
• Support for recordkeeping requirements.
• Support for search.

The negatives with using metadata relate to usability and syncing.

• End-users generally don’t like to add more than two items of metadata when they upload a document.
• End-users generally don’t ‘get’ categorization or grouping by metadata (but generally they don’t seem to mind pre-defined views).
• Metadata columns are not visible in libraries that are synced to File Explorer.
• If a metadata column is mandatory, the synced library will become read only.
• Global metadata defined in the MMS may not suit all parts of the business. We found that even a simple set of terms to define ‘Document Type’ (e.g., ‘Meetings’, ‘Agenda’) varied across the organisation.

Suggested use case:

• Use metadata columns to categorise records (and the MMS) only when it meets a specific business need, not by default. For example, a document library for organisational policies that lists each policy (or group of policies and procedures) via the ‘Policy Name’ metadata field. The metadata can be used to describe the policies and related documents, categorize them in multiple ways. End users are unlikely to need to sync this library. This method also assists with cross-referencing related policies including by using links.

Content Types

Content types are a fundamental building block in SharePoint, and are used to define content.

SharePoint has long included the concept of a ‘Content Type Hub’ where, in theory, all Content Types are centralised. This will be replaced in the near future with the new ‘Content Types Gallery’ option accessible from the SharePoint Admin portal.

All content types derive from the top level ‘System’ content type that is used to define the ‘Item’ content type which in turn defines the ‘Document’ content type.

Every SharePoint document library includes (a) the default ‘Document’ content type with two metadata columns ‘Title’ and ‘Name’ and (b) the default ‘Folder’ content type. They also include the ‘Document Set’ content type when this is enabled as a site feature.

New content types are created from the Site Settings area of every SharePoint site but must be added to a library by first allowing content types (from Library Settings – Advanced) and then adding them from ‘Existing Site Content Types’. This process includes document sets which are discussed below.

Given their direct relationship with metadata, there may be a tendency to want to create a lot of content types whenever additional metadata is required and to apply multiple custom content types to a single document library to define a type of content when other options, such as a metadata choice or even folders, may work better.

In the screenshot below, the library column shows the Content Type for the particular object. This column can be grouped in a view, providing a way to show different content types in the library.

The benefits with using content types are as follows:

• Help to define content through the use of metadata.
• May include a template document which can use the metadata applied to the item. For example, automatically adding the metadata in the body of a Word document as a content control.

The negatives with using content types are as follows:

• There can be too many content types.
• End users don’t like having to choose a content type, especially if the only apparent purpose is to define a document type (e.g., ‘Meetings’ vs ‘Agenda’). In this case, a simple metadata column would be sufficient OR use document naming conventions instead.
• End users don’t like adding metadata after having to choose a content type.
• If any column in the content type is mandatory, it will cause the synced library to become read-only.

Suggested use case:

• A document library that is used to support a specific business purpose where it is necessary to define one or more documents using additional metadata, and a pre-defined document template is required. For example, a document library used to store client agreements based on a template. For each client agreement, there is a requirement to capture certain metadata (client name, address, phone, etc) which will then be auto-populated into the template agreement document.

Document Sets

Document sets are a like a super folder in that they behave like normal folders but have a lot more functionality.

As noted above, document sets must be enabled as a feature before they become visible in the list of available content types. Once enabled, and the option to ‘Allow management of content types’ is enabled in the Library Settings (under ‘Advanced’), they can be added to a document library from the list of available content types.

Document sets can be very useful where there is a need for (a) a unique identifier for a folder inside a library, (b) additional metadata to help define a group of documents and (c) access controls that may be different from the library. (Note – this last option is also possible with folders, see below).

While document sets may sound appealing to business areas that want to ‘hard categorize’ content in a document library (for example, every document set contains a policy, and related procedures, forms and so on), this can actually result in making it harder for end-users to find information. The reverse of this is that they can be very useful if there is a genuine requirement to restrict access to information.

Document sets are visible in the screenshot above regarding content types. When added to a document library, they are visible from the ‘New’ menu as shown below:

The positives of document sets include the following:

• They can have a unique ID (based on the Document ID being enabled in the library); the Document ID is the same used for the documents.
• Metadata can be added automatically to the body of template documents (via content controls) stored in document content types linked with the document set.
• They can be used to restrict access.

The negatives of document sets include the following:

• Can make it harder to find information, especially if there are more than around 30 in a library.
• Searches may retrieve only one document. It will also not retrieve the document set. There may be other related documents.
• Can be more difficult to replace with other options because of the relationship between document sets and linked document content types.
• In synced file libraries, document sets appear as folders. For this reason it is recommended that any library using document sets includes at least one mandatory column to make the synced version read-only. Ideally, end-users should not need to sync these libraries.

Suggested use cases:

• Document sets are a good way to group client-related or employee documents in a single library, especially when there is a need to restrict access between the document sets. In this sense, document sets work like ‘sub-files’ in a library. For example, Manager ‘Jim’ may need to see five document sets, while Manager ‘Mary’ may need to see eight others. Neither will be able to see the others files when they access the library.
• In smaller organisations, a SharePoint site might include a library called ‘Projects’, with one document set per project. Larger organisations might have a library per project, even larger organisations might have a single SharePoint site (perhaps based on a Microsoft 365 Group) per project.

Folders

Pretty much everyone knows what folders are and how they are used. Every SharePoint document library includes the option to create folders. When synced to File Explorer, end users can create folders there too.

It is possible to prevent the creation of folders in SharePoint via the Library Settings – Advanced – Folders option but this option should really only be enforced in exceptional circumstances.

It is also possible to view all the content in a library without folders by editing the view (or creating a new ‘No folders’ view) and changing the option in the ‘Folders’ section from ‘Display items in folders’ to ‘Show all items without folders’. It is not uncommon to find, when the no-folder view is displayed, to see fewer documents than folders. It is sometimes a good way for admins to demonstrate the benefit of using metadata columns instead.

The positives of using folders include the following:

• Everyone knows how to use them.
• They can be created from File Explorer.

The negatives of using folders including the following:

• Too many folders and levels.
• Folders that repeat other previous words in the URL path, including the name of the site and the library.
• One word folders – for example: Meetings – 2020 – June – 8.
• Folders with unique permissions.

Suggested use case:

• Folders are best for simple document libraries. It is a good idea to let end users know about the 400 character limit and suggest they might consider creating new libraries if the folders are clearly about entirely different subjects (unless this is very low level). For example, don’t mix records about meetings with records about policies or staff rosters all in the same library.
• Note: Try to avoid using unique permissions on folders. If unique permissions are really required, create a separate library.

Using all four (or a mix of the four) options

It is possible to use all four options in the same library:

• Folders
• Additional metadata colums, which may be used to group content in views without folders
• Added content types, including document sets with added metadata.

But it’s probably not a good idea to do this.

Keep it simple

If you are trying to categorise records in a way that makes some sense, it is not a bad idea to keep it simple and only deploy the option or options that best meets the business needs.

• Folders are best for most end users interacting with a library including via File Explorer. Limit the use of extra metadata – for example ‘Document Type’, keeping in mind that added metadata is not (yet) visible in libraries synced to File Explorer.
• Use metadata to create read-only views of records or other content stored in a library (for example, policies), and a small group of people is responsible for that metadata. Using metadata to group content in this way can be better than using folders or document sets. Keep in mind that not all columns (including MMS columns) can be grouped in views but they can be filtered.
• Use custom content types including document sets in situations where there is a need to add specific metadata to records (and use it in templates), or group them in ‘sub-files’ in a document library. Folders can be used in document sets to categorise content further.

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