MappingEditor: Select direction and type of mapping

[nichtich]

Mappings can also have a type (first URI in field type). These types should be selected together with the mapping direction. Good symbols need to be found for each combination:

symbols	URI
⥢ ⥤ ⇐ ⇒ ⟸ ⟹	http://www.w3.org/2004/02/skos/core#exactMatch
← → ⟵ ⟶	http://www.w3.org/2004/02/skos/core#closeMatch
> ⥸	http://www.w3.org/2004/02/skos/core#broadMatch
\< ⥶	http://www.w3.org/2004/02/skos/core#narrowMatch
↜ ↝ ⇜ ⇝ ⬿ ⤳	http://www.w3.org/2004/02/skos/core#relatedMatch
⤎ ⤏ ↼ ⇀	http://www.w3.org/2004/02/skos/core#mappingRelation

broadMatch/closeMatch probably don't make sense in both directions, they are more likely to be from broader to narrower concept

[stefandesu]

How about something like this?

(This is made with Vue.js transitions.)

[stefandesu]

Suggestion: Instead of allowing the mapping to be reversed (which would introduce yet another element in the interface and make it more crowded and confusing), should we maybe allow the user to switch sides, i.e. swap the left and right schemes and therefore the mapping? This would make it clear that a mapping is always from left to right. The button for this action could be in the middle of the navigation bar, for example.

[nichtich]

Yes, swapping sides seems less confusing. Let's keep this independent issue for a later version. We'll still have the five mapping types above (plus another I forgot for "unknown mapping type" http://www.w3.org/2004/02/skos/core#mappingRelation).

[stefandesu]

I already noticed that when I went through the JSKOS specification earlier. Should this be added as well? If yes, should it be selectable? What symbol should it have (maybe a question mark)?

Otherwise I'm almost finished implementing this.

[stefandesu]

Another questions: Has the mapping type anything to do with what kind of relation the mapping is, i.e. whether to use memberSet (one-to-many relation) or memberChoice (many one-to-one relations)? If not, we need a way to choose whether the mapping is one-to-one or one-to-many (related to this issue, but could be a separate issue as well).

[nichtich]

Selection of memberSet (AND) vs. memberChoice (OR) vs. memberList (AND with order) is #45.

[stefandesu]

Could you also answer my previous question about the "unknown mapping type":

Should this be added as well? If yes, should it be selectable? What symbol should it have (maybe a question mark)?

Except for that, this issue is done.

[nichtich]

Symbols are far too large and the mappingTypeHeader/mappingTypeDescription can be removed. Maybe Material Design guidelines for radio buttons can help for inspiration.

[stefandesu]

Symbols are far too large and the mappingTypeHeader/mappingTypeDescription can be removed. Maybe Material Design guidelines for radio buttons can help for inspiration.

I just pushed another update, could you take a look? I was unsure how the guidelines for radio buttons could help though.

[nichtich]

Solved so far with https://github.com/gbv/cocoda/pull/48. User feedback is needed to clarify icon symbols and to check whether dropdown may be a better interface.

[stefandesu]

I'm closing this issue for now (we can always reopen later if necessary).