# Split Web Pages into Multiple Documents

You might want to split pages into multiple documents. For example, if you ingest pages from a discussion board you might want to ingest one document for each message on the page.

Connector Framework Server can create documents for sections of a Web page identified using CSS selectors. CFS creates a child document for each section of the page that is identified. Metadata fields (named `CHILD_DOCUMENT`) are added to the parent document, to refer to the child documents.

To split pages into multiple documents, add the following parameters to your `WKOOPHtmlExtraction` task:

`ChildDocumentSelector` | A CSS2 selector that identifies the root element of each child document in the page source.
`ChildReferenceSelector` | (Optional) An element in the child document that contains a value to use as the document reference. The value you extract should be unique for each child document, because it is used as part of the `DREREFERENCE` field in the child document. If you do not set this parameter, the connector uses a GUID. Specify the element using a CSS2 selector, relative to the element identified by `ChildDocumentSelector`.
`ChildMetadataSelector` | (Optional) A list of elements in the child document that contain metadata. The metadata in these elements are extracted and added to the metadata fields of child documents. Specify the elements as a list of CSS2 selectors, relative to the element identified by `ChildDocumentSelector`. To specify the name(s) of the document field(s) to contain the extracted information, set the configuration parameter `ChildMetadataFieldName`. Both parameters must have the same number of values.
`ChildMetadataFieldName` | (Optional) The names to use for document fields (in child documents) that contain information extracted using the parameter `ChildMetadataSelector`. This parameter must have the same number of values as `ChildMetadataSelector`.

For example, consider the following example page which represents messages on a page of a discussion board:

    <html>
        <head>
            <title>Example Page</title>
            <meta charset="utf-8">
        </head>
        <body>
            <div>
                <h1>Example Page</h1>
                <div class="content">
                    <p>content</p>
                </div>
                <div class="message">
                    <h1>Message 1</h1>
                    <p class="meta">some metadata</p>
                    <p>some content</p>
                </div>
                <div class="message">
                    <h1>Message 2</h1>
                    <p class="meta">some metadata</p>
                    <p>some content</p>
                </div>
                ...
            </div>
        </body>
    </html>

To create separate documents for the messages contained on this page, you could use the following configuration:

    [MyTask]
    ...
    ChildDocumentSelector=div.message
    ChildReferenceSelector=h1
    ChildMetadataFieldName0=my_metadata
    ChildMetadataSelector0=p.meta

This example would produce the following child document (and a similar document for the second message):

    #DREREFERENCE <current_document_reference>:<child_reference>
    #DREFIELD my_metadata="some metadata"
    ...
    #DRECONTENT
    Message 1
    some metadata
    some content
    ...

The value of the `DREREFERENCE` field is constructed from the reference of the original document and the value of the element identified by the `ChildReferenceSelector` configuration parameter. If you don't set this configuration parameter or the element is not found, CFS uses a GUID instead.

CFS adds the reference of the original document to the fields `DREPARENTREFERENCE` and `DREROOTPARENTREFERENCE`. It also adds an `HTML_PROCESSING` metadata field that contains any metadata and links that are extracted from the child document.

The `DRECONTENT` field is populated with text extracted from the HTML elements that you identified as belonging to the child document.

Connector Framework Server automatically adds fields to the parent document, named `CHILD_DOCUMENT`, that contain the references of associated child documents.

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