To avoid strongly connecting multimedia metadata I've seen "image metadata" components that have fields such:
- image (multimedia component link)
- alt text
- title
- width
- height
This allows us to separate context-specific information. For example a banner component could serve this role and might link to a multimedia image. Since alt text also depends on context, it doesn't make sense to set these fields in the multimedia metadata. We can also localize text for media separate from the multimedia.
In SDL Tridion 2011 I have advanced image options for richtext fields. When adding an image, I can set:
- (alt) text
- alignment
- width
- height
- proportion

This affect the attributes in the source. For example:
<img src="tcm:5-274" title="buddy" alt="buddy" style="vertical-align: top; width: 70px; height: 70px;"/>
When were these in-RTF options introduced and are they configurable?