GIS Glossary/X

GIS Glossary

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x,y coordinates
A pair of values that represents the distance from an origin (0,0) along two axes, a horizontal axis (x), and a vertical axis (y). On a map, x,y coordinates are used to represent features at the location they are found on the earth's spherical surface.

x,y event
A simple coordinate pair that describes the location of a feature, such as a set of latitude and longitude degrees.

x,y values
A pair of values that represents the distance from an origin (0,0) along two axes, a horizontal axis (x), and a vertical axis (y). On a map, x,y coordinates are used to represent features at the location they are found on the earth's spherical surface.

x,y,z coordinates
In a planar coordinate system, three coordinates that locate a point by its distance from an origin (0,0,0) where three orthogonal axes cross. Usually, the x-coordinate is measured along the east&#8211;west axis, the y-coordinate is measured along the north&#8211;south axis, and the z-coordinate measures height or elevation.

x-axis
In a planar coordinate system, the horizontal line that runs right and left (east and west of) the origin (0,0).

XData
In AutoCAD, extra optional data attached to an AutoCAD drawing element.

XLS
XML for location-based services. In ArcWeb Services, XLS is a method for encoding requests and responses and associated ADTs for the GeoMobility Server.

XMI
Acronym for XML Metadata Interchange. A standard that specifies how to store a UML model in an XML file.

XML
Acronym for Extensible Markup Language. Developed by the W3C, a standardized general purpose markup language for designing text formats that facilitates the interchange of data between computer applications. XML is a set of rules for creating standard information formats using customized tags and sharing both the format and the data across applications.

XML Metadata Interchange
A standard that specifies how to store a UML model in an XML file.

XML recordset document
In ArcGIS, an export file containing the features or records from an individual geodatabase feature class or table. Data in the file is encoded in XML and can be imported into an existing feature class or table.

XML workspace document
In ArcGIS, an export file containing one or more geodatabase feature datasets, feature classes, and tables. It can include schema and data or just the schema. Schema and data in the file are encoded in XML and can be imported into a geodatabase.

XPath
A language used to find specific parts of an XML document and compute values from the document's content.

XSL
Acronym for Extensible Style Language. A set of standards for defining XML document presentation and transformation. An XSL style sheet may contain information about how to display tagged content in an XML document, such as font size, background color, and text alignment. An XSL style sheet may also contain XSLT code that describes how to transform the tagged content in an XML document into an output document with another format. The W3C maintains the XSL standards.

XSLT
Acronym for Extensible Style Language Transformations. A language for transforming the tagged content in an XML document into an output document with another format. An XSL style sheet contains the XSLT code that defines each transformation to be applied. Transforming a document requires the original XML document, an XSL document containing XSLT code, and an XSLT processor (parser) to execute the transformations. The W3C maintains the XSLT standard.