Module:inline

local m_inline = require("Module:inline")
local term, args = m_inline.parse("hello<key1:value1><key2>")

Yields:

term = "hello"
args = {["key1"] = "value1", ["key2"] = true}

---

local export = {}

function export.parse(term)
    local args = {}
    local i, key, value = 1
    while i < #term do
        key, value, i = mw.ustring.match(term, "<([a-zA-Z]+):([^>]+)>()", i)
        if key and value then args[key] = value else break end
    end
    return mw.ustring.gsub(term, "<[a-zA-Z]+:[^>]+>", ""), args
end

return export