使用pandoc将Evernote标记语言（ENML）转换为Markdown

Question

我正在尝试使用Pandoc将Evernote Markup Language（ENML）转换为Markdown。 ENML主要是XHTML的一个子集，带有一些额外的元素。我想要转换的元素是一个特殊的<en-todo checked="true"/>。以下是包含两个en-todo项的ENML文档示例：

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE en-note SYSTEM "xml/enml2.dtd">
<en-note style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">
  <div><en-todo checked="true"/>This is a thing<br/></div>
  <div><en-todo checked="false"/>This is another thing<br/></div>
</en-note>

我正在尝试将其转换为以下降价：

[X] This is a thing
[ ] This is another thing

我目前的方法是创建一个JSON过滤器

pandoc --parse-raw -f html -t json test.enml | \
      ./my-filter | pandoc -f json -t markdown

我不确定如何正确解析RawInline块：

[
    {
        "Para": [
            {
                "RawInline": [
                    "html",
                    "<en-todo checked=\"true\">"
                ]
            },
            {
                "RawInline": [
                    "html",
                    "</en-todo>"
                ]
            },
            {
                "Str": "This"
            },
            "Space",
            {
                "Str": "is"
            },
            "Space",
            {
                "Str": "a"
            },
            "Space",
            {
                "Str": "thing"
            },
            "LineBreak"
        ]
    },
    {
        "RawBlock": [
            "html",
            "</div>"
        ]
    },
    {
        "RawBlock": [
            "html",
            "<div>"
        ]
    },
    {
        "Para": [
            {
                "RawInline": [
                    "html",
                    "<en-todo checked=\"false\">"
                ]
            },
            {
                "RawInline": [
                    "html",
                    "</en-todo>"
                ]
            },
            {
                "Str": "This"
            },
            "Space",
            {
                "Str": "is"
            },
            "Space",
            {
                "Str": "another"
            },
            "Space",
            {
                "Str": "thing"
            },
            "LineBreak"
        ]
    }
]