» XPath (XML)
This site relies heavily on Javascript. You should enable it if you want the full experience. Learn more.

XPath (XML)

Help Returns a Spread of matches to XPath Queries
Author vvvv group

Here you are supposed to see an image (rendered with SVG) describing the pins of this node. However, this does not work with Internet Explorer. You may want to consider using another browser, like FireFox, Chrome, Safari or Opera that do support SVG.

Credits
Warnings
Bugs

related discussions

start a forum thread about this node

about XPath (XML)

Returns a Spread of matches from an XPath-Query.
XPath is a W3C Recommendation and describes a way how to navigate through XML Documents.
We can use XPath to select values of elements from a XML File. Every XPath Expression must start with "/". An XPath expression works like navigating a file system; where a forward slash (/) selects subdirectories.
Inside of [ ] Brackets you can specify you your Query. Then you keep on defining the Path with "/". The "@" means that you select an attribute.

There are a lot of functions and operators you can use. We cant give a complete instruction to XPath. But try the Microsoft Reference Online.
A good site to learn everything about the X-Stuff ishttp://www.w3schools.com
A good reference of XPath Syntax and Fuctions is http://msdn.microsoft.com/en-us/library/ms256115.aspx

Examples

if you ever had a look at a .v4p file using a texteditor you will see that those are also pure XML.
so the following examples will be based on vvvv's own files.

parsing a .v4p file with this query

/PATCH/NODE/PIN[@pinname='Descriptive Name']/@values

will output a spread containing all Descriptive Names used in the patch.

/PATCH/NODE[@id='7']/@nodename

will output the nodename of the node with the id ="7"

so this way you can navigate in XML with paths similar to the folderstructures of your harddisk.

you can do more advanced queries like:

/PATCH/NODE[(@nodename='IOBox (Value Advanced)')and(not(PIN[contains(@pinname,'Descriptive Name')]))]/@id

which will output a spread containg all id's of IOBox Values which do NOT have a Descriptive Name.

hints

See also XSLT (XML)

anonymous user login

Shoutbox

~15d ago

~18d ago

joreg: The Winter Season of vvvv workshops is now over but all recordings are still available for purchase: https://thenodeinstitute.org/ws23-vvvv-intermediates/

~24d ago

schlonzo: Love the new drag and drop functionality for links in latest previews!

~1mth ago

joreg: Workshop on 29 02: Create Sequencers and Precise Clock Based Tools. Signup here: https://thenodeinstitute.org/courses/ws23-vvvv-08-create-sequencers-and-precise-clock-based-tools-in-vvvv-gamma/

~1mth ago

joreg: Workshop on 22 02: Unlocking Shader Artistry: A Journey through ‘The Book of Shaders’ with FUSE. Signup here: https://thenodeinstitute.org/courses/ws23-vvvv-12-book-of-shaders/

~2mth ago

joreg: Talk and Workshop on February 15 & 16 in Frankfurt: https://visualprogramming.net/blog/vvvv-at-node-code-frankfurt/

~2mth ago

woei: @Joanie_AntiVJ: think so, looks doable