Name
xml_tree_doc — returns an entity object given a tree from xml_tree
Synopsis
xml_tree_doc
(
|
in tree any , |
in
base_uri
varchar
); |
Description
This returns an entity object given a tree of the form returned by xml_tree.
If it is given a string as an argument, it will automatically generate
the parse tree and use it to make the entity instead requiring you to run the string through
xml_tree first. Note that it is better to use xtree_doc
or
xper_doc
for converting source XML text directly to an XML entity.
If the argument is an XML tree entity, the function will return it as is, so
e.g. redundant calls of xml_tree_doc
will have no effect.
The only thing xml_tree_doc can alter in the returned value is base URI of
the document entity: if base_uri
is provided and is
not NULL, and argument entity has no base URI set then the provided URI
is assigned to the returned entity.
Any other type of argument is illegal, including XML persistent entity.
Parameters
tree
either an XML tree such as that returned by xml_tree(), or a string of XML data. If a string is provided then it will automatically generate the parse tree and form an entity instead of requiring you to run the string through xml_tree() first.
base_uri
Base URI of the original document, if known. It will be useful if the document is not "standalone" and some entity references are relative references to resources located "somewhere near" the "top-level" document passes as "tree" parameter.
Return Types
XML entity object
Errors
Table 24.130. Errors signalled by
| SQL State | Error Code | Error Text | Description |
|---|---|---|---|
Examples
Example 24.518. Transforming an XML Document
declare doc_base varchar;
declare doc_tree any;
doc_base := 'virt://WS.WS.SYS_DAV_RES.RES_FULL_PATH.RES_CONTENT:/DAV/docsrc/';
doc_tree := xml_tree_doc(xml_tree(
xml_uri_get(doc_base, 'virtdocs.xml')
), doc_base);
http_value(
xslt('virt://WS.WS.SYS_DAV_RES.RES_FULL_PATH.RES_CONTENT:/DAV/stylesheets/html_chapter.xsl',
doc_tree
)
);