XML Forms Data Format (XFDF) Specification - Adobe Partners

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Appendix: XFDF Definitions for Comments on 3D or Rich Media Annotations XML Forms Data Format Specification value 128 value units The value tag defines the numerical value representing a measurement value. This value is converted to a text string and displayed as part of the measurement text string. Content model Double. Attributes None. The units tag contains a text string indicating the units of the associated measure value. This is appended to the value string when presenting the measurement. Content model Text String. Attributes None. precision The precision tag defines the number of decimal digits shown for the measurement value. If not specified, the default is three decimal places. Content model Integer. Attributes usertext None. The usertext tag contains an optional text string that is appended to the end of the measurement. Content model Text String.
Appendix: XFDF Definitions for Comments on 3D or Rich Media Annotations XML Forms Data Format Specification Angular Dimension Related Elements 129 Attributes None. Angular Dimension Related Elements An angular measurement is used to denote the angle between two linear entities, as displayed in the following figure. As illustrated in the figure above, angular measurement markup consists of two anchor points, one located on each of the two linear entities whose angle is being measured. An extension line is connected to each anchor point, which is collinear with the edge it measures. A labeled arc, with an arrowhead at each end, connects the two extension lines to specify the angle being measured. The following figure displays the key geometric parameters for an angular dimension. The angle is defined by the measurement value (30 degree in the figure above) and is the angle between the leader direction vectors (D1 and D2). The angular measurement markup is generated by first computing the center point of the angle, cp in the figure above. Since the anchor points (A1 and A2) are on the annotation plane finding the intersection of the direction vectors (D1 and D2) passing through anchor points (A1 and A2) is a straightforward process. The text position (TP) controls the position of the measurement text, the placement of the angle arc, and the length and direction of the extension lines. The extensions lines are drawn from the anchor point to a point at a distance ||TP-cp|| from the center point cp along the associated direction vector (which is the intersection of the angle arc and the extension line). The angle arc center is at the center point cp (and its radius is ||TP – cp||) and is drawn between the two extensions lines. The markup text is displayed (based on the text orientation parameters) with the lower left corner of the text string starting at the text position (TP).
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Contents 1 Introduction to XFDF....
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Contents XML Forms Data Format Spec
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XML Forms Data Format Specification
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Introduction to XFDF XML Forms Data
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XFDF Reference XML Forms Data Forma
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XML Forms Data Format (XFDF) Specification - Adobe Partners

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