I think these abbreviations are for "subject", "transitive verb" and "direct object", and more commonly abbreviated as SVO. This is standard word order in English: "The man kicked the dog" where man is the subject, kick the verb and the dog the object, or "the boy kissed the girl" where boy is the subject, kiss the verb and the girl the object. In other languages you can have SOV order (The boy the girl kissed) or VSO order (Kissed the boy the girl).
"STVDO" does not have a widely recognized or established meaning. It may be an acronym or abbreviation specific to a certain context or organization.
it is a pattern that follows. eg: <> +<><>+<><><> etc.
yot nyo
yot nyo
a constant pattern
A pattern that comes again, and again,, and again, and - - -
extend your answer
The letter "S" defines a wave pattern.
dance pattern is a group of a steps that are usually repeated.
À pattern that gets smaller in evey row
A Conjecture
The regular pattern in which a crystal is arranged