writeMultipleProperties() method misses op writeallproperties

[danielpeintner]

The writeMultipleProperties() method states in Step 3

If option's formIndex is defined, let form be the Form associated with formIndex in [[td]]'s forms array, otherwise let form be a Form in [[td]]'s forms array whose op is writemultipleproperties, selected by the implementation.

Should we also op writeallproperties ?

relates to #219

[zolkis]

The TD spec should specify better the writeallproperties op, including error cases.

IMHO from a script's point of view, writeProperties() should be able to cover both writeMultipleProperties and writeAllProperties.

The only difference between them could be that writeAllProperties would replace all properties at the target, i.e. remove the properties not specified by writeAllProperties. However, such behaviour is not specified in the TD spec, therefore at the moment writeAll and writeMultiple are the same, from Scripting side.

Please suggest algorithms for both writeMultipleProperties() and writeAllProperties() and point out how would they differ.

[danielpeintner]

Let's wait what we can achieve in w3c/wot-thing-description#1349

[danielpeintner]

I added the label "Needed by other TF" to w3c/wot-thing-description#1349