<spanGrp>

<spanGrp> (span group) collects together span tags. 17.3 Spans and Interpretations
組件analysis — 17 Simple Analytic Mechanisms
屬性 att.interpLike (@resp, @type, @inst)
屬於 model.global.meta
可包含
analysis: span
宣告
element spanGrp { att.global.attributes, att.interpLike.attributes, span* }