Is there a Developer's API kit for XML?

<script type="text/javascript">google_ad_client = "pub-8800625213955058";/* 336x280, 创建于 07-11-21 */google_ad_slot = "0989131976";google_ad_width = 336;google_ad_height = 280;//</script><script type="text/javascript"src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>Several are available or under development, such as SAX. Details of these and other XML software are held on the XML Web pages.The established conversion and application development engines like Balise, Omnimark, and SGMLC all have XML capability and they all provide APIs. Details of XML software of all kinds is on the XML Web pages.