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if @type == :visible indexterm: primary=@text
@text¶ ↑
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else
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terms = (attr :terms)
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numterms = terms.size
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if numterms > 2 indexterm
primary=terms[0] secondary=terms[1] tertiary=terms[2]
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if numterms > 1 indexterm
primary=terms[numterms - 2] secondary=terms[numterms - 1]
indexterm: primary=terms[numterms - 1]
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