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-- intermediate store for variables and their values
local variables = {}
--- Function called for each raw block element.
function RawBlock (raw)
-- Don't do anything unless the block contains *org* markup.
if raw.format ~= 'org' then return nil end
-- extract variable name and value
local name, value = raw.text:match '#%+(%w+):%s*(.+)$'
if name and value then
variables[name] = value
end
end
-- Add the extracted variables to the document's metadata.
function Meta (meta)
for name, value in pairs(variables) do
meta[name] = value
end
return meta
end