libstreambuffer-java 1.5.4-1 (amd64 binary) in ubuntu eoan

 A stream buffer is a stream-based representation of an XML
 info-set in Java. Stream buffers are designed to: provide
 very efficient stream-based memory representations of XML
 info-sets; and be created and processed using any Java-based
 XML API.
 .
 Conceptually a stream buffer is similar to the representation
 used in the Xerces deferred DOM implementation, with the crucial
 difference that a stream buffer does not store hierarchical
 information like parent and sibling information. The deferred
 DOM implementation reduces memory usage when large XML documents
 are parsed but only a subset of the document needs to be processed.
 (Note that using deferred DOM will be more expensive than
 non-deferred DOM in terms of memory and processing if all
 the document is traversed.)
 .
 Stream buffers may be used as an efficient alternative to DOM where:
 * most or all of an XML info-set will eventually get traversed; and/or
 * targeted access to certain parts of an XML info-set are required
   and need to be efficiently processed using stream-based APIs like
   SAX or StAX.