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This shows you the differences between two versions of the page.

--- en:infra-convert:user:terms [2019/03/25 09:16]
me
+++ en:infra-convert:user:terms [2019/09/04 17:08]
me [Category (characteristic-)]
@@ Line 14: / Line 14: @@
 <WRAP noprint>
 <WRAP group>
-<WRAP column 25%>
+<WRAP column 37%>
 //**__Content__**//
@@ Line 27: / Line 27: @@
  • [[en:infra-convert:user:terms#Drawing sheet]]\\
  • [[en:infra-convert:user:terms#Drawing data format]]\\
+ **F**\\
+ • [[en:infra-convert:user:terms#Font]]\\
  **M**\\
  • [[en:infra-convert:user:terms#Measurement (sizes-)]]\\
@@ Line 32: / Line 34: @@
  • [[en:infra-convert:user:terms#Project]]\\
  **S**\\
+ • [[en:infra-convert:user:terms#Specification operators and modifiers (ISO GPS)]]\\
  • [[en:infra-convert:user:terms#Stamp/stamps]]\\
  **T**\\
+ • [[en:infra-convert:user:terms#Tag]]\\
  • [[en:infra-convert:user:terms#Test plan]]\\
- • [[en:infra-convert:user:terms#Tolerance table]]\\
+ • [[en:infra-convert:user:terms#Tolerance table]]
- • [[en:infra-convert:user:terms#Tag]]
 \\
@@ Line 62: / Line 65: @@
 The following categories can be assigned in #@IC_HTML@#:
-|< 100% 25% 50% 20% 5% >|
+|< 100% 25% 50% 25%>|
-^  Category  ^  Description  ^  References  ^  ID  ^
+^  Category  ^  Description  ^  References  ^
-^ Standard characteristic | Characteristic that is not assigned to any of the following categories. | – |  1  |
+^ Standard characteristic | Characteristic that is not assigned to any of the following categories. | – |
-^ Special characteristic | A critical characteristic that deserves special attention. If the implementation of the characteristic does not correspond to the drawing specifications, a potential risk to functions (operational safety, interchangeability, service life, etc.) has to be expected to a great extent.\\ \\ Example of tagging:\\ {{ :en:infra-convert:user:terms:grafik_besondere_merkmale.png?direct&420| }} | – |  2  |
+^ Special characteristic | A critical characteristic that deserves special attention. If the implementation of the characteristic does not correspond to the drawing specifications, a potential risk to functions (operational safety, interchangeability, service life, etc.) has to be expected to a great extent.\\ \\ Example of tagging:\\ {{ :en:infra-convert:user:terms:grafik_besondere_merkmale.png?direct&420| }} | – |
-^ Auxiliary measurement | Measurement that is not required for the geometric determination of a part and is not considered an integral part of the contract.\\ \\ Example for the tagging:\\ {{ :en:infra-convert:user:terms:grafik_hilfsmasse.png?direct&420| }} | • DIN 406-10:1992-12 |  3  |
+^ Auxiliary measurement | Measurement that is not required for the geometric determination of a part and is not considered an integral part of the contract.\\ \\ Example for the tagging:\\ {{ :en:infra-convert:user:terms:grafik_hilfsmasse.png?direct&420| }} | • DIN 406-10:1992-12 |
-^ Rough measurement | Measurement that refers to the initial state of an object.\\ \\ Example for the tagging:\\ {{ :en:infra-convert:user:terms:grafik_rohmasse.png?direct&420| }} | • DIN 406-10:1992-12 |  4  |
+^ Rough measurement | Measurement that refers to the initial state of an object.\\ \\ Example for the tagging:\\ {{ :en:infra-convert:user:terms:grafik_rohmasse.png?direct&420| }} | • DIN 406-10:1992-12 |
-^ Theoretically accurate measurement | Measurement for indication of the geometrically ideal (theoretically precise) position or shape of the dimensioned shape element.\\ \\ Example for the tagging:\\ {{ :en:infra-convert:user:terms:grafik_theoretisch_genaue_masse.png?direct&420| }} | • DIN 406-10:1992-12 |  5  |
+^ Theoretically accurate measurement | Measurement for indication of the geometrically ideal (theoretically precise) position or shape of the dimensioned shape element.\\ \\ Example for the tagging:\\ {{ :en:infra-convert:user:terms:grafik_theoretisch_genaue_masse.png?direct&420| }} | • DIN 406-10:1992-12 |
-^ Test measurement | Measurement that must be given special attention when determining the extent of the test / test accuracy.\\ \\ Example for the tagging:\\ {{ :en:infra-convert:user:terms:grafik_pruefmasse.png?direct&420| }} | • DIN 406-10:1992-12 |  6  |
+^ Test measurement | Measurement that must be given special attention when determining the extent of the test / test accuracy.\\ \\ Example for the tagging:\\ {{ :en:infra-convert:user:terms:grafik_pruefmasse.png?direct&420| }} | • DIN 406-10:1992-12 |
 \\
@@ Line 224: / Line 227: @@
 ^ Chamfer |  –  | Workpiece edge in the form of a specific, chamfered surface.\\ \\ Example:\\ {{:en:infra-convert:user:terms:grafik_fasen.png?direct&420|}} | • DIN 406-10:1992\\ • DIN 406-11:1992 |  33  |  −  |
 ^ Curve |  –  | Workpiece edge in the form of a specific, rounded surface.\\ \\ **Standard measurement unit** Millimetres\\ \\ Example:\\ {{:en:infra-convert:user:terms:grafik_rundungen.png?direct&420|}} | • DIN 406-10:1992\\ • DIN 406-11:1992 |  35  |  −  |
+^ Edge |  –  | Workpiece edge. Specification without reference to a standard.\\ \\ **Standard measurement unit** Millimeter (mm) | − |  36  |  −  |
 \\
@@ Line 261: / Line 265: @@
 ^ Largest material share |  {{:en:infra-convert:user:terms:icon_klasse_oberflaeche_mr2.png?nolink&35|}}  | Parameter of the roughness core profile. Material share in percent at the level of the cutting line, which separates the deep valleys from the roughness core profile.\\ //The roughness core profile is the roughness profile without projecting peaks and deep valleys.//\\ \\ **Standard measurement unit** Percent\\ \\ {{:en:infra-convert:user:terms:grafik_oberflaechenkenngroesse_mr2.png?direct&420|}} | • DIN EN ISO 13565-2:1998\\ • DIN EN ISO 1302:2002 |  72  |  162  |
 ^ Reduced peak height |  {{:en:infra-convert:user:terms:icon_klasse_oberflaeche_rpk.png?nolink&35|}}  | Average height of the projecting peaks above the roughness core profile.\\ //The roughness core profile is the roughness profile without projecting peaks and deep valleys.//\\ \\ **Standard measurement unit** Micrometres\\ \\ {{:en:infra-convert:user:terms:grafik_oberflaechenkenngroesse_rpk.png?420|}} | • DIN EN ISO 13565-2:1998\\ • DIN EN ISO 1302:2002 |  28  |  155  |
-^ Reduced groove depth |  {{:en:infra-convert:user:terms:icon_klasse_oberflaeche_rvk.png?nolink&35|}}  | Average depth of the profile valleys below the roughness core profile.\\ //The roughness core profile is the roughness profile without projecting peaks and deep valleys.//\\ \\ **Standard measurement unit** Micrometres\\ \\ {{:en:infra-convert:user:terms:grafik_oberflaechenkenngroesse_rvk.png?direct&420|}} | • DIN EN ISO 13565-2:1998\\ • DIN EN ISO 1302:2002 |    |  156  |
+^ Reduced groove depth |  {{:en:infra-convert:user:terms:icon_klasse_oberflaeche_rvk.png?nolink&35|}}  | Average depth of the profile valleys below the roughness core profile.\\ //The roughness core profile is the roughness profile without projecting peaks and deep valleys.//\\ \\ **Standard measurement unit** Micrometres\\ \\ {{:en:infra-convert:user:terms:grafik_oberflaechenkenngroesse_rvk.png?direct&420|}} | • DIN EN ISO 13565-2:1998\\ • DIN EN ISO 1302:2002 |  29  |  156  |
 ^ Base roughness depth |  {{:en:infra-convert:user:terms:icon_klasse_oberflaeche_r3z.png?nolink&35|}}  | Vertical parameter of the roughness profile. Amplitude value of the third highest profile peak from the third largest profile valley.\\ \\ **Standard measurement unit** Micrometres\\ \\ {{:en:infra-convert:user:terms:grafik_oberflaechenkenngroesse_r3z.png?direct&420|}} | Not officially standardised. |  32  |  159  |
 ^ Additional surface specifications |  –  | Machining allowance, position and orientation of surface grooves.\\ \\ **Standard measurement unit** – | • DIN EN ISO 1302:2002 |  118  |  –  |
@@ Line 335: / Line 339: @@
 ^ Marking |  –  | Fixed or detachable with a workpiece or assembly to be connected in plain text or machine-readable information.\\ \\ **Standard measurement unit** –\\ \\ **Note** Available from program version 1.2.0.32 | – |  131  |  –  |
 ^ Function |  –  | Task to be performed by the workpiece or assembly.\\ \\ **Standard measurement unit** –\\ \\ **Note** Available from program version 1.2.0.32 | – |  132  |  –  |
+^ Undefined |  –  | No class is defined.\\ \\ **Standard measurement unit** –\\ \\ **Not** Available from program version 1.2.0.32 | – |  -1  |  0  |
 \\
@@ Line 404: / Line 409: @@
 ==== Drawing data format ====
-Different data formats have been established for the exchange of →[[en:infra-convert:user:terms#Zeichnung (Technische)|Technical drawings]]. All exchange formats transport at least the graphic information of a drawing printed on paper. Vector formats and specially developed drawing formats in particular also store information, which facilitate automated reading by computer programs.
+Various data formats have been established for the digital exchange of →[[en:infra-convert:user:terms#Drawing (technical)|technical drawings]]. Each data format transports at least the graphic information of a drawing printed on paper. In addition, vector formats and especially specially developed drawing data formats store information that facilitates automated readout by computer programs.
-A drawing is put together based on standards from graphic elements linear in shape as well as text elements. These standards are now widely recognized on an international level. The meaning is conveyed to the reader from the arrangement of the individual elements to each other. However, implementing this type of interpretation work in terms of software is complex and only possible to a very limited extent. Drawing formats therefore offer an additional means to store such information.
+Basically, a technical drawing is constructed according to largely internationally defined standards from linear graphic elements as well as text elements. The reader derives the meaning from the arrangement of the elements in relation to each other. However, this kind of interpretation work can only be implemented by software to a very limited extent. For this reason, additional information is stored in drawing data formats, which indicates to a software that the elements belong together and what they mean.
-We have to initially differentiate between raster-bound and vector-based formats.
+The suitability of different data formats for automated interpretation can be generalized as follows:
+{{ :en:infra-convert:user:terms:uebersicht_zeichnungsdatenformate.png?nolink&600 |}}
+> In #@IC_HTML@#, a CAD exchange format is the minimum requirement for fully automatic feature recognition.
 <WRAP group>
-<WRAP column half>
+<WRAP column 40%>
-**Raster graphics** such as JPG, PNG, BMP, TIFF and GIF only transport graphical information addressed to the reader. Software can only retrieve the stored information by referring to the pixels (//Pattern recognition//). The technologies that are actually implemented focus on the text recognition, the so-called //Optical Character Recognition// (OCR). They have, at least in the area of technical drawings, a recognition rate of around 50%.
+**Raster graphic formats** only transport the graphic information addressed to the reader. Software can only retrieve the stored information ("pattern recognition") by relating the pixels to one another. Actually used technologies concentrate on text recognition, the so-called "Optical Character Recognition" (OCR). They have a recognition rate of about 50 to 70 %, at least in the area of technical drawings.
-The adjacent illustration shows the structure of a raster graphic as an example.
+> In #@IC_HTML@#, drawings in raster graphic format can be stamped manually using the quick input dialog.\\ \\ **See**\\ Functions > Characteristics > [[en:infra-convert:user:functions:ballooning_man|Manually stamp]]
 </WRAP>
-<WRAP column half>
+<WRAP column 55%>
-{{ :en:infra-convert:user:terms:rastergrafik.png?direct&300 |}}
+{{ :en:infra-convert:user:terms:rastergrafikformat.png?nolink&450 |}}
 </WRAP>
 </WRAP>
-**Vector formats**, in contrast, store graphic elements as unique, mathematically depicted graphic primitives (basic geometric elements such as straight lines, circular arcs and splines as well as surfaces such as circles, polygons and spline surfaces) as well as texts using character encoding. The //Portable Document Format// (PDF) supports vector-based data storage, for example.
+Vector graphic formats, on the other hand, store graphic elements as unique, mathematically described graphic primitives. The latter mean basic geometric elements such as straight lines, arcs, and splines, as well as surfaces such as circles, polygons, and spline surfaces. Texts are stored either as polylines or with the help of character encoding (see also →[[en:infra-convert:user:terms#font|Font]]).
+> In #@IC_HTML@#, character-coded texts are a prerequisite for automatic feature recognition.
 <WRAP group>
-<WRAP column half>
+<WRAP column 40%>
-**Drawing formats** also combine vector elements to groups or blocks that belong together and store group and drawing-related metadata in doing so. Views, hatchings, dimensional entries etc. remain identifiable as such. The //Drawing Interchange File Format// (DXF) released by Autodesk has become established as a global, neutral industry standard. Autodesk's own DWG format (from "__d__ra__w__in__g__") is also supported by the majority of CAD systems. #@IC_HTML@# also supports the IGES format (//Initial Graphics Exchange Specification)//.
+The PDF format (PDF = "Portable Document Format") supports raster-based and vector-based data storage. Coded text characters are stored in text fields, such as "⌀ 20" in the adjacent example.
-The adjacent example illustrates vector elements as they can be displayed using a viewer based on a drawing format. The colors code the line widths. The monochrome display (text and graphic elements in one color) is preferred in #@IC_HTML@#.
+> In #@IC_HTML@#, drawings in raster-based PDF format can be stamped manually using the quick input dialog. Drawings in vector-based PDF format can be stamped automatically* if the characters are coded.\\ \\ * A pro license is required.\\ \\ **See**\\ Functions > Characteristics > [[en:infra-convert:user:functions:ballooning_man|Manually stamp]]\\ Functions > Characteristics > [[en:infra-convert:user:functions:ballooning|Automatic stamping]]
 </WRAP>
-<WRAP column half>
+<WRAP column 55%>
-{{ :en:infra-convert:user:terms:zeichnungsformat.png?direct&300 |}}
+{{ :en:infra-convert:user:terms:pdf-format.png?nolink&450 |}}
 </WRAP>
 </WRAP>
-\\
+<WRAP group>
+<WRAP column 40%>
-----
+With the PDF format it should be noted that not all CAD systems export all characters encoded - usually special characters -, but as geometric elements. The suitability for automated readability is reduced accordingly.
-\\
+</WRAP>
+<WRAP column 55%>
+{{ :en:infra-convert:user:terms:pdf-format_schriften_als_geometrien.png?nolink&450 |}}
+</WRAP>
+</WRAP>
-==== Tag ====
+\\
 <WRAP group>
-<WRAP column 80%>
+<WRAP column 40%>
-→[[en:infra-convert:user:terms|Test characteristics]] can also be assigned individual **tags** in #@IC_HTML@# in addition to →[[en:infra-convert:user:terms#Kategorie (Merkmal-)|Categories]]. While categories indicate a basic handling of test characteristics (relevance for testing, based on standard specifications), tags are intended to support the test process by increasing the clarity. Thus, tags may refer to measuring stations, measuring devices or test intensity for example.
+**CAD formats** store data largely based on design elements. Views, hatches, dimension entries etc. remain recognizable as such for a processing software, such as the dimension entry for the diameter 20 of the cylinder in the adjacent example.
-Assigned tags are exported by #@IC_HTML@# in the test plan, provided that they are supported by export format. Tagged test characteristics are identified on the drawing by coloration of the stamp.
+> In #@IC_HTML@# drawings can be processed in DXF format ("Drawing Interchange File Format", worldwide and neutral industry standard), in DWG format (Autodesk's own format, also supported by most CAD systems) or in IGES format* ("Initial Graphics Exchange Specification").\\ \\ * A license for the IGES module is required.\\ \\ **Note** The multicolored representation of native CAD drawing formats has the background that the colors encode line widths. In the early days of CAD, different line widths could only be displayed poorly on the screen using the technology of the time. An ink pen was assigned to a color on the plotter. An assignment table for line widths ("pentable") is usually not exported to the usual exchange formats. For better legibility, #@IC_HTML@# therefore displays drawings in monochrome ("black on white") as standard.
 </WRAP>
-<WRAP column 15%>
+<WRAP column 55%>
-{{ :en:infra-convert:user:terms:icon_kennzeichnen.png?nolink&100|}}
+{{ :en:infra-convert:user:terms:cad-format.png?nolink&450 |}}
 </WRAP>
 </WRAP>
-<WRAP group>
+\\
-<WRAP column 25%>
-**Example** Graduation of special characteristics
+----
-</WRAP>
+\\
-<WRAP column 70%>
-{{ :en:infra-convert:user:terms:kennzeichnungen_verwendung_01.png?direct&700 |}}
+==== Font ====
-</WRAP>
+Non-graphic information is specified in technical drawings using characters. Characters can be letters, numbers, diacritics, punctuation marks, and additional graphic symbols. Due to their frequent repetition, they are grouped into a stock, the character set. In electronic data processing, characters are uniquely identified by coding in a character set. Numerous standards exist worldwide for character coding. "ASCII" is an example of a very small set, "Unicode" an example of a very large set to which characters are continuously added. A digital character set is called a **font**. A font file usually contains a character set with a uniform graphic design.
-</WRAP>
+{{ :en:infra-convert:user:terms:schriftartdatei.png?nolink&700 |}}
+In addition to the purely visual representation of characters, the unambiguous definition of characters is important for the automatic analysis of technical drawings. PDF files are generally used to displaying characters correctly. This is because the character definitions used are saved in the file. This is (unfortunately) different with the CAD exchange formats DXF, DWG and IGES. In them only the references to characters are stored in font files. The font files are therefore required for correct display.
+> **Significance for #@IC_HTML@#** Fonts are protected by copyright. In most cases, the rights of use are only granted for a fee. The number of fonts used by CAD systems is immensely high. Supplying these fonts would disproportionately increase the cost of #@IC_HTML@# licenses. For this reason, #@IC_HTML@# replaces fonts not installed on the computer with visually similar fonts when loading drawing files. If this is the case, a note message is issued.
+{{ :en:infra-convert:user:terms:schriftarten_austauschformate.png?nolink&700 |}}
 \\
@@ Line 517: / Line 540: @@
 Even if it is technically possible, a project should always only refer to an object that is subject to a test and, if necessary, follow-up tests. This may be, for example, the initial sampling of a product and its subsequent re-sampling (first-piece approvals, requalifications).
+\\
+----
+\\
+==== Specification operators and modifiers (ISO GPS) ====
+The ISO GPS standard system based on DIN EN ISO 8015 regulates the language with which requirements for the geometry of a product are communicated. With an entry – constructed from "specification elements" – on the technical drawing, a **specification operator** in the standards system is invoked. A specification operator collates rules ("operations") that are used to allow all the contract parties to understand the requirements of a geometric element or the relationship between geometric elements.
+The principle of standard setting applies here, namely the "default principle". Unless indicated through the addition of supplementary information in the contract agreement, the specification operator only includes default operations in a fixed order according to ISO standards. The default is chosen so that the operations approximately correspond to the most commonly used procedure and conventional understanding in practice.
+In the following image, the concept is illustrated using the shaft geometric element with a nominal diameter of 20 mm as an example. At first only the defaults specification is considered, as shown on the left side. The drawing entry specifies a "linear size element" according to DIN EN ISO 14405-1 of the type "cylinder". The default specification operator demands consideration of the "local two-point size": All independently determined individual distances from opposite lying points must lie within the tolerance range, i.e. according to tolerance code "h9" of DIN EN ISO 286-1 at an interval of between 19.948 mm and 20 mm. Five arbitrary two-point sizes on the non-ideal surface model are represented as a geometric equivalent.* One suitable means of verification ("verification operator") for this specification would be to carry out a check using a go/no go gauge: 1) Pass check (go): Is the maximum material size exceeded?; 2) Fail check (no-go): Is the minimum material size undershot?
+<WRAP group>
+<WRAP indent>
+* The operations of the specification operator in detail: The extracted lateral surface is assigned an ideal cylinder using the least squares method (Gaussian). The extracted lateral surface is to be cut at each height perpendicular to the derived centreline of this associated cylinder. At each cutting plane, the surface line is assigned an ideal circle according to the Gaussian method. A horizontal line is generated through each point on the surface line and the circle midpoint. If there is exactly one second intersection point with the surface line with respect to the midpoint, the distance between the two surface line intersection points is the two-point size to be matched with the interval.
+</WRAP>
+</WRAP>
+{{ :en:infra-convert:user:terms:iso-gps_spezifikationen.png?direct&800 |}}
+The deviation from the default setting can be identified using suitable specification modifiers (and/or abbreviations). In this way a "special specification operator" is obtained. In this example, the "E in circle" modifier symbol sets the envelope condition. The envelope condition requires that the evaluated geometry lies in an enveloping cylinder 20 mm in diameter and that all two-point sizes are greater than or equal to 19.948 mm. A suitable verification would be to test using a ring gauge or to carry out a no-go test using a go/no go gauge.
+Below are examples of modifier text symbols with their meanings, such as those that can be assigned to a characteristic as property "modifiers" in #@IC_HTML@#.
+<WRAP group>
+<WRAP column half>
+|< 100% 20% 85% >|
+^ Modifiers for linear sizes (according to DIN EN ISO 14405-1:2017-07; Characteristic classes: Length, diameter, spherical diameter) ^^
+|  LP  | Two-point size |
+|  LS  | Local spherical size |
+|  LL  | Local outer minimum material size |
+|  GG  | Gauss method association criterion |
+|  GX  | Maximum inscribed geometric element association criterion |
+|  GN  | Minimum circumscribed geometric element association criterion |
+|  GC  | Minimax association criterion |
+|  CC  | Circumference diameter (calculated size) |
+|  CA  | Area diameter (calculated size) |
+|  CV  | Volume diameter (calculated size) |
+|  SX  | Maximum rank-ordered size |
+|  SN  | Minimum rank-ordered size |
+|  SA  | Average rank-ordered size |
+|  SM  | Median rank-ordered size |
+|  SD  | Mid-range rank-ordered size |
+|  SR  | Range of rank-ordered sizes |
+|  SQ  | Standard deviation of sizes |
+|  E  | Envelope requirement |
+|  /Length  | Any limited part of the geometric element |
+|  ACS  | Any cross-section |
+|  SCS  | Specific fixed cross-section |
+|  ALS  | Any longitudinal section |
+|  Number x  | More than one geometric element\\ //Assigned as the number of repetitions of the characteristic as a property.// |
+|  CT  | Common tolerance |
+|  F  | Condition of the free state |
+|< 100% 20% 80% >|
+^ Modifiers for angular sizes (according to DIN EN ISO 14405-3:2017-07; Characteristic class: Angle) ^^
+|  LC  | Two-line angular size with minimax association criterion |
+|  LG  | Two-line angular size with least squares association criterion |
+|  GG  | Global angular size with least squares association criterion |
+|  GC  | Global angular size with minimax association criterion |
+|  SX  | Maximum angular size |
+|  SN  | Minimum angular size |
+|  SA  | Average angular size |
+|  SM  | Median angular size |
+|  SD  | Mid-range angular size |
+|  SR  | Range of angular sizes |
+|  SQ  | Standard deviation of angular size |
+|  SCS  | Specific fixed cross-section |
+|  CT  | Common tolerated angular size element |
+|  F  | Condition of the free state |
+</WRAP>
+<WRAP column half>
+|< 100% 20% 80% >|
+^ Modifiers for geometric features (according to DIN EN ISO 1101:2017-09; Characteristic classes: Geometrical tolerancing (form, orientation, location and run-out)) ^^
+|  CZ  | Combined zone |
+|  SZ  | Separate zones |
+|  UZ  | Specified tolerance zone offset |
+|  OZ  | Unspecified linear tolerance zone offset (offset zone) |
+|  VA  | Unspecified angular tolerance zone offset (variable angle) |
+|  C  | Minimax (Chebyshev) feature |
+|  G  | Least squares (Gaussian) feature |
+|  N  | Minimum circumscribed feature |
+|  T  | Tangent feature |
+|  X  | Maximum inscribed feature |
+|  A  | Derived feature |
+|  P  | Projected tolerance zone |
+|  C  | Minimax (Chebyshev) feature without constraint |
+|  CE  | Minimax (Chebyshev) feature with external material constraint |
+|  CI  | Minimax (Chebyshev) feature with internal material constraint |
+|  G  | Least squares (Gaussian) feature without constraint |
+|  GE  | Least squares (Gaussian) feature with external material constraint |
+|  GI  | Least squares (Gaussian) feature with internal material constraint |
+|  N  | Minimum circumscribed feature |
+|  X  | Maximum inscribed feature |
+|  T  | Total range of deviations |
+|  P  | Peak height |
+|  V  | Valley depth |
+|  Q  | Standard deviation |
+|  UF  | United feature |
+|  LD  | Minor diameter |
+|  MD  | Major diameter |
+|  PD  | Pitch diameter |
+|  ACS  | Any cross section |
+|  M  | Maximum material requirement |
+|  L  | Least material requirement |
+|  R  | Reciprocity requirement |
+|  F  | Free state condition (non-rigid parts) |
+|  CF  | Contacting feature |
+|  E  | Envelope requirement |
+</WRAP>
+</WRAP>
 \\
@@ Line 563: / Line 704: @@
 {{ :en:infra-convert:user:terms:vergleich_stempelformen.png?direct&860 |}}
+\\
+----
+\\
+==== Tag ====
+<WRAP group>
+<WRAP column 80%>
+→[[en:infra-convert:user:terms|Test characteristics]] can also be assigned individual **tags** in #@IC_HTML@# in addition to →[[en:infra-convert:user:terms#Kategorie (Merkmal-)|Categories]]. While categories indicate a basic handling of test characteristics (relevance for testing, based on standard specifications), tags are intended to support the test process by increasing the clarity. Thus, tags may refer to measuring stations, measuring devices or test intensity for example.
+Assigned tags are exported by #@IC_HTML@# in the test plan, provided that they are supported by export format. Tagged test characteristics are identified on the drawing by coloration of the stamp.
+</WRAP>
+<WRAP column 15%>
+{{ :en:infra-convert:user:terms:icon_kennzeichnen.png?nolink&100|}}
+</WRAP>
+</WRAP>
+<WRAP group>
+<WRAP column 25%>
+**Example** Graduation of special characteristics
+</WRAP>
+<WRAP column 70%>
+{{ :en:infra-convert:user:terms:kennzeichnungen_verwendung_01.png?direct&700 |}}
+</WRAP>
+</WRAP>
 \\

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