Untitled

## BDB::XML::Modify

Modify encapsulates the context within which a set of documents specified by a query can be modified in place.

The modification is performed using the methods BDB::XML::Container#modify and BDB::XML::Document#modify

There are two parts to the object -- the query and the operation. The query identifies target nodes against which the operation is run. The operation specifies what modifications to perform.

### Class Methods

`allocate`
  Allocate a new object

### Methods

`count`
  return the number of node hits in the specified query.
`initialize(xpath, operation, type = BDB::XML::Modify::None, name = "", content = "", location = -1, context = nil)`

  xpath is a String, or an BDB::XML::Context object

  operation can have the value BDB::XML::Modify::InsertAfter, BDB::XML::Modify::InsertBefore, BDB::XML::Modify::Append, BDB::XML::Modify::Update, BDB::XML::Modify::Remove or BDB::XML::Modify::Rename.

  type can have the value BDB::XML::Modify::Element, BDB::XML::Modify::Attribute, BDB::XML::Modify::Text, BDB::XML::Modify::ProcessingInstruction, BDB::XML::Modify::Comment or BDB::XML::Modify::None.

  name is the name for the new content.

  content the content for operations that require content.

  location indicate where a new child node will be placed for the append operation

  context is valid only when a String is given as the first argument. This must be a BDB::XML::Context which contains the variable bindings, the namespace prefix to URI mapping, and the query processing flags.

`encoding=(string)`
  Specify a new character encoding for the modified documents.