如何在GCP Document AI Toolbox Converter中正确配置页码？

我尝试在配置JSON中添加页码，但多次尝试均未成功。查看转换器代码时发现多处提及“page_number”，因此认为该功能可行。另外，有没有关于配置文件创建的官方文档？我仅在GitHub上找到部分示例。

为便于创建配置文件，我将待转换的原始JSON转换为中间JSON文件，其结构如下（可调整信息位置）：

{
    "document": "document_name.pdf",
    "labels": [
        {
            "label": "label_1",
            "text": "some_text",
            "page": 1,
            "boundingBoxes": [
                0.11554117647058823,
                0.17014227068750512,
                0.32081176470588235,
                0.1710069997542349,
                0.32081176470588235,
                0.1818570739388864,
                0.11554117647058823,
                0.18099234487215662
            ]
        },
        {
            "label": "label_2",
            "text": "some_text",
            "page": 2,
            "boundingBoxes": [
                0.269359477124183,
                0.5985227851890204,
                0.386081045751634,
                0.5980899758112141,
                0.386081045751634,
                0.6102450429168925,
                0.269359477124183,
                0.6098081885916301
            ]
        }
    ]
}

我尝试了以下几种配置文件，但所有配置均导致第2页及以后的bounding box被错误映射到第一页：

配置1 #

{
    "entity_object":"labels",
    "page": {
        "pageNumber":"page"
    },
    "entity": {
        "type_":"label",
        "mention_text":"text",
        "normalized_vertices":{
            "type":"3",
            "unit":"normalized",
            "base":"boundingBoxes",
            "x":"x",
            "y":"y"
        }
    }
}

配置2 #

{
    "entity_object":"labels",
    "page": {
        "page_number":"page"
    },
    "entity": {
        "type_":"label",
        "mention_text":"text",
        "normalized_vertices":{
            "type":"3",
            "unit":"normalized",
            "base":"boundingBoxes",
            "x":"x",
            "y":"y"
        }
    }
}

配置3 #

{
    "entity_object":"labels",
    "entity": {
        "type_":"label",
        "mention_text":"text",
        "pageNumber":"page",
        "normalized_vertices":{
            "type":"3",
            "unit":"normalized",
            "base":"boundingBoxes",
            "x":"x",
            "y":"y"
        }
    }
}

配置4 #

{
    "entity_object":"labels",
    "entity": {
        "type_":"label",
        "mention_text":"text",
        "page_number":"page",
        "normalized_vertices":{
            "type":"3",
            "unit":"normalized",
            "base":"boundingBoxes",
            "x":"x",
            "y":"y"
        }
    }
}

内容的提问来源于stack exchange，提问作者Augusto Firmo