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@xlink:show #246

Closed SJagodzinski closed 2 years ago

SJagodzinski commented 3 years ago

Xlink: Show

Remove xlink namespace and attribute @xlink:show. Do not replace with @show.

Agreed in EAC-CPF and in EAD team to remove this attribute to simplify the schema, cf Berlin meeting:

Use @linkrole, @linktitle, and @href, from former XLink attributes and drop @actuate, @arcrole, @show.

Creator of issue

  1. Silke Jagodzinski
  2. TS-EAS: EAC-CPF subgroup
  3. silkejagodzinski@gmail.com

Related issues / documents

EAD3 Reconciliation

Corresponding attribute in EAD: @show

Summary: A control that defines whether a remote resource that is the target of a link appears in a new window, replaces the local resource that initiated the link, appears at the point of the link (embed), initiates some other action, or causes no target resource to display. It is used in conjunction with actuate to determine link behavior.

Values: new, replace, embed, other, none

Context

Summary: Used to signal intended behavior with respect to where the remote resource is to appear when the link is resolved.

Description and Usage: The xlink:show should be used with the xlink:actuate to indicate intended behavior. The xlink:show is used to signal intended behavior with respect to where the remote resource is to appear when the link is resolved. The values indicate whether the resource is to appear embedded at the point of the link ("embed"), replace the resource in which it appears ("replace"), or in a new window ("new"). "None" or "other" are also valid values.

Data Type: "embed" or "new" or "replace" or "none" or "other"

Solution documentation: agreed solution for TL and guidelines

SJagodzinski commented 3 years ago

Comments on @xlink:show in our Berlin meeting notes:

@fordmadox :

could be handled another way, but just a note that EAD's dao element heavily relies on @show to determine whether a digital object is a thumbnail or not.

@kerstarno :

While I can see, why @show could be used as a work-around with regard to showing a thumbnail as "embed" and a digital object as "new" or "replace", I'm not sure I would agree that that's the actual question behind this.

What we'd want to have would be a way to say "this digital object is a thumbnail" and "this digital object is a high-resolution version of the image". But that's more about typing the digitial object than about defining how the link is supposed to act when shown.

In Archives Portal Europe, by the way, we use @xlink:title (EAD 2002) to differentiate between thumbnails and a higher resolution version. The high-res <dao> would have an actual title of the linked image, which could be shown as alternative text for accessibility reasons, while the thumbnail only has the title "thumbnail".

It's a work-around as well, I know; just wante to add it as an example that doesn't use @(xlink:)show for this purpose.

kerstarno commented 3 years ago

Tested as part of Schema Team's schema testing:

The above applies to both schemas, RNG and XSD.

The attribute is ready.