---
address: common.device.imei
description: IMEI (14-digit base + Luhn check digit = 15 digits)
generator: tdc
---
<sequence name="base"><gen type="regex" value="[0-9]{14}"/></sequence>
<sequence name="imei"><compute>
  <let name="sum">
    <reduce>
      <over><field name="base"/></over>
      <init><int v="0"/></init>
      <do><add><acc/>
        <choose>
          <when>
            <test><equals>
              <mod><current_index/><int v="2"/></mod>
              <mod><add><length><field name="base"/></length><int v="1"/></add><int v="2"/></mod>
            </equals></test>
            <then>
              <let name="d"><multiply><current/><int v="2"/></multiply></let>
              <choose>
                <when><test><greater_than><use name="d"/><int v="9"/></greater_than></test>
                      <then><subtract><use name="d"/><int v="9"/></subtract></then></when>
                <otherwise><use name="d"/></otherwise>
              </choose>
            </then>
          </when>
          <otherwise><current/></otherwise>
        </choose>
      </add></do>
    </reduce>
  </let>
  <let name="check"><mod><subtract><int v="10"/><mod><use name="sum"/><int v="10"/></mod></subtract><int v="10"/></mod></let>
  <result><concat><field name="base"/><use name="check"/></concat></result>
</compute></sequence>
<data>${{imei}}</data>