This page is part of the Getting Started Section.
In BaseX, a single database contains an arbitrary number of resources. By default, all resources have been XML documents. Since Version 7.0, however, raw files (binaries) can be stored as well.
New databases can either be created in the GUI, on command line, or using any of our APIs. XML documents can be specified along with the create operation, which will be added to the database in a bulk operation:
- Console: enter
basex -c "CREATE DB dbname /path/to/resources"
- GUI: Go to Database → New, press Browse to choose an initial file or directory, and press OK
Various parsers can be chosen to influence the database creation, or to convert different formats to XML,
Existing databases can eventually be dropped again:
Once you have created a database, additional commands exist to modify its contents:
- XML documents can be added with the
- Raw files are added with
- Any resource can be replaced with another using the
- Any resources can be deleted with the
To speed up the insertion of new documents in bulk operations, you can turn the AUTOFLUSH option off.
The following commands create an empty database, add two resources and finally delete them again:
CREATE DB example SET AUTOFLUSH off ADD example.xml ADD ... STORE TO images/ 123.jpg DELETE /
You may as well use the BaseX-specific XQuery Database Functions to add, replace and delete XML documents:
for $file in file:list("/path/to/xml/documents") return db:add("database", $file)
Last but not least, XML documents can also be added via the GUI and the Database menu.
The stored resources can be accessed in different ways:
Various XQuery functions exist to access the XML documents in databases and other locations:
db:open("dbname", "path/to/docs"): (only) returns documents that are found in the specified database.
collection("path/to/docs"): returns the documents that are either found in the database specified in the argument, or at the specified location (file path or URL).
doc("path/to/document.xml"): returns a single document found at the specified location (file path or URL). If a database already exists for the addressed resource, it is opened instead.
RETRIEVEcommand returns raw files without modifications.
- The XQuery function
db:retrieve("dbname", "path/to/docs")returns raw files in their Base64 representation. By choosing
"method=raw"as Serialization Option, the data is returned in its raw form:
declare option output:method "raw"; db:retrieve('multimedia', 'sample.avi')