Document type is the identifier of different account transactions like SA for G/L,AA for Asset Accounting etc.The doc.
The Strange Situation This is a method devised by Ainsworth and Bell to measure the type of attachment that a child has formed. It uses many terms and concepts that you should already be familiar with from earlier work in the topic, e.g. Glasgow Babies and the Love Quiz.
Validity of the 'Strange Situation.' Some have argued that the strange situation only measures the relationship between the child and one other person (usually the mother) so rather than measuring attachment type it is simple measuring relationship.