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| = Disclaimer =
| | This manual has been superseded (replaced) by a PDF: |
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| This description is meant to inform the community how to layout
| | http://svn.smallangles.net/trac/canSAS/browser/1dwg/tags/v1.0/doc/cansas-1d-1_0-manual.pdf?format=raw |
| the information within the XML files. However, should the
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| information in this document and the [[cansas1d.xsd | canSAS 1D SAS XML Schema]]
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| differ, the XML Schema will be deemed to have the most correct description
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| of the standard.
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| = General Layout of the XML Data =
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| == overview ==
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| [[Image:cansas1d-v1-1-SASroot.png|thumb|block diagram at SASroot level]]
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| After an XML header, the root element of the file is SASroot which
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| contains one or more SASentry elements, each of which describes
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| a single experiment (data set, time-slice, step in a series, new
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| sample, etc.). Details of the SASentry element are also
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| shown in the next figure. Refer to the '''block diagram at SASroot level'''
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| for an alternative depiction. See [[cansas1d.xml]] for an example XML file.
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| [[1D_Data_Formats_Working_Group#Examples_and_Case_Studies|Examples and Case Studies]]
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| and other background information are available on the
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| [[1D_Data_Formats_Working_Group|canSAS 1D Data Formats Working Group]] page
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| and its [[Talk:1D_Data_Formats_Working_Group|discussion]] page. Details about
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| each specific field (XPath string, XML elements and attributes) are described
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| on the [[cansas1d_definition_of_terms]] page.
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| === block diagrams ===
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| There are block diagrams available to describe the standard:
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| *[[media:cansas1d-v1-1-SASroot.png | SASroot]]
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| ** SASentry (data set, time-slice, step in a series, new sample, etc.)
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| ***Title (for this particular SASentry)
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| ***Run (run number or ID number of experiment)
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| ***[[media:cansas1d-v1-2-SASdata.png | SASdata]] (this is where the reduced 1-D SAS data is stored)
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| ***[[media:cansas1d-v1-3-SASsample.png | SASsample]]
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| ***[[media:cansas1d-v1-4-SASinstrument.png | SASinstrument]]
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| ****[[media:cansas1d-v1-5-SASsource.png | SASsource]]
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| ****[[media:cansas1d-v1-6-SAScollimation.png | SAScollimation]]
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| ****[[media:cansas1d-v1-7-SASdetector.png | SASdetector]]
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| ***[[media:cansas1d-v1-8-SASprocess.png | SASprocess]] (for each processing or analysis step)
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| *** SASnote (anything at all)
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| * [[media:cansas1d-v1-9-full.png | full block diagram]]
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| === required XML file header ===
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| <pre>
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| <?xml version="1.0"?>
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| <SASroot version="1.0"
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| xmlns="http://www.smallangles.net/cansas1d"
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| xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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| xsi:schemaLocation="http://www.smallangles.net/cansas1d/
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| http://www.smallangles.net/cansas1d/1.0/cansas1d.xsd"
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| >
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| </pre>
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| === alternative XML file header (referencing a stylesheet) ===
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| <pre>
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| <?xml version="1.0"?>
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| <?xml-stylesheet type="text/xsl" href="example.xsl" ?>
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| <SASroot version="1.0"
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| xmlns="http://www.smallangles.net/cansas1d"
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| xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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| xsi:schemaLocation="http://www.smallangles.net/cansas1d/
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| http://www.smallangles.net/cansas1d/1.0/cansas1d.xsd"
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| >
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| </pre>
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| === XML layout for multiple experiments ===
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| Each experiment is described with a single '''SASentry''' element.
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| The brief example below shows how multiple experiments can be included
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| in a single XML file. (For the sake of brevity, the data for each experiment
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| has been omitted from the example below.)
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| <pre>
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| <?xml version="1.0"?>
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| <SASroot version="1.0"
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| xmlns="http://www.smallangles.net/cansas1d"
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| xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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| xsi:schemaLocation="http://www.smallangles.net/cansas1d/
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| http://www.smallangles.net/cansas1d/1.0/cansas1d.xsd"
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| >
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| <SASentry name="071121.dat#S22">
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| <!-- contents of the first experiment in the file go here -->
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| </SASentry>
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| <SASentry name="name attribute is optional">
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| <!-- any number of additional experiments can be included, as desired -->
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| </SASentry>
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| </SASroot>
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| </pre>
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| == Rules ==
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| [[Image:Q-geometry.jpg|thumb|definition of Q geometry for small-angle scattering]]
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| [[Image:Translation-orientation-geometry-2.jpg|thumb|definition of translation and orientation geometry]]
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| # canSAS1d/1.0 XML data files will adhere to the standard if they can successfully [[cansas1d_documentation#Validation_of_XML_against_the_Schema | validate]] against the established XML Schema ([http://svn.smallangles.net/svn/canSAS/1dwg/trunk/cansas1d.xsd http://svn.smallangles.net/svn/canSAS/1dwg/trunk/cansas1d.xsd])
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| # Q=(4 π / λ) sin(θ) <br> where λ is the wavelength of the radiation and 2θ is the angle through which the detected radiation has been scattered.
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| # units to be given in standard SI abbreviations (eg, m, cm, mm, nm, K) with the following exceptions:
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| ##um=micrometres
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| ##C=celsius
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| ##A=Angstroms
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| ##percent=%.
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| ##fraction
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| ##a.u.=arbitrary units
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| ##none=no units are relevant (such as dimensionless)
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| # where reciprocal units need to be quoted the format shall be "1/abbreviation"
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| # axes:
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| ##z is along the flight path (positive value in the direction of the detector)
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| ##x is orthogonal to z in the horizontal plane (positive values increase to the right when viewed towards the incoming radiation)
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| ##y is orthogonal to z and x in the vertical plane (positive values increase upwards)
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| #orientation (angles):
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| ##roll is about z
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| ##pitch is about x
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| ##yaw is about y
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| # Unicode characters MUST NOT be used
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| # Binary data is not supported
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| Note: translation and orientation geometry used by canSAS are consistent with:
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| #http://en.wikipedia.org/wiki/Cartesian_coordinate_system
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| #http://en.wikipedia.org/wiki/Right-hand_rule
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| #http://www.nexusformat.org/Coordinate_Systems
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| #http://mcstas.risoe.dk/documentation/tutorial/node6.html
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| #http://webhost5.nts.jhu.edu/reza/book/kinematics/kinematics.htm
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| = Documentation and Definitions =
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| * '''Documentation''': [[cansas1d_documentation]]
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| * '''Definitions''': [[cansas1d_definition_of_terms]]
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| * '''Block diagrams''': [[cansas1d_documentation#block_diagrams]]
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| == XML Schema ==
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| * '''XML Schema''': defines the rules for the XML file format ([http://svn.smallangles.net/trac/canSAS/browser/1dwg/trunk/cansas1d.xsd TRAC], [http://svn.smallangles.net/svn/canSAS/1dwg/trunk/cansas1d.xsd SVN])
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| * [[xsd-documentation.xsl | XSL stylesheet]] (used to extract information shown on the [[cansas1d_definition_of_terms | Schema documentation page]])
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| == XML Stylesheets ==
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| Stylesheets could be used to strip out the metadata or to convert into another file format. No examples have yet been described here.
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| == Examples and Case Studies ==
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| * [[cansas1d.xml | basic example]]: Note that, for clarity, only one row of data is shown. This is probably a very good example to use as a starting point for creating XML files with a text editor.
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| * [[bimodal-test1.xml]]: Simulated SAS data to test size distribution calculation routines.
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| * [[cansas1d_casestudy_collagen | dry chick collagen]]: illustrates the minimum information necessary to meet the requirements of the standard format
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| * [[cansas1d_casestudy_af1410 | AF1410 steel]]: SANS study using magnetic contrast variation (with multiple samples and multiple data sets for each sample)
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| * [[cansas1d-template.xml]]: This is used to test all the rules in the XML Schema. This is probably not av very good example to use as a starting point for creating XML files with a text editor since it tests many of the special-case rules.
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| == Support tools for Visualization & Analysis software ==
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| === IgorPro ===
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| An import/export tool for [http://www.wavemetrics.com/ IgorPro] has been created
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| ([http://svn.smallangles.net/trac/canSAS/browser/1dwg/trunk/IgorPro/cansasXML.ipf cansasXML.ipf]).
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| You can check out the <nowiki>IgorPro</nowiki> working directory from the SVN server (see below).
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| As of 2008-03-14,
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| * test suite of XML files developed
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| * the support can import the XML files into IgorPro
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| * Development of a GUI (to support the [http://usaxs.xor.aps.anl.gov/staff/ilavsky/irena.html Irena] package) has begun
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| * Development to add export capabilities (from IgorPro) back to the cansas1d/1.0 format has begun
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| == Software respoitories ==
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| * '''TRAC''': [http://svn.smallangles.net/trac/canSAS http://svn.smallangles.net/trac/canSAS]
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| * '''Subversion''': [http://svn.smallangles.net/svn/canSAS/1dwg http://svn.smallangles.net/svn/canSAS/1dwg]
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| = Validation of XML against the Schema = | |
| # open browser to: http://www.xmlvalidation.com/
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| # paste content of candidate XML file (with reference in the header to the XML Schema as shown above) into the form
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| # press <validate>
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| # paste content of [[cansas1d.xsd]] XSD file into form and press <continue validation>
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| # check the results
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