Drop "ON DELETE CASCADE" on page_template, since this might lead to crippled entries in the database.
When someone delets via operations in the database a form, protentially existing form pages refering to this item might be left in a crippled state. The cascade operation deletes the revision (xowiki_page_instance), but leaves the half-crippled item. The problem does not exist over the web interface, since it does not allow such items to be deleted while form pages exist.
Consider code like # # dom parse -simple -html $form doc # ... # return [$root asHTML]
Unfortunately, this causes that some tags unknown to tdom (like <adp:icon>) are converted to escaped tags (< ...). This can be regarded as a bug. To avoid this problem, we substitute here the adp_tags in advance. This needs more investigation in other cases.... The potential harm in this cases here is very little, but probably, there are other cases as well where this might harm.
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