# Page Depth for New URLs

The `synchronize` action, with the `identifiers` parameter, might be used to synchronize a page with a URL that the connector has never seen before. When you use the `synchronize` action with the `identifiers` parameter, the connector does not crawl the website, so in this case the connector sets the `DEPTH` document field to a large value. The next time the page is synchronized the field is updated with the depth from the start URL. If the page cannot be reached from the start URL then the connector sends an ingest-delete command to remove the document from the IDOL index.

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