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Table 846 shows the action dictionary entries speci c to named actions
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TABLE 846 Additional entries speci c to named actions
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KEY TYPE VALUE
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name name
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(Required) The type of action that this dictionary describes; must be Named for a named action (Required) The name of the action to be performed (see Table 845)
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Four additional action types (submit-form, reset-form, import-data, and JavaScript) are de ned for use with interactive forms See Section 864, Form Actions, for details
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An interactive form (PDF 12) sometimes referred to as an AcroForm is a collection of elds for gathering information interactively from the user A PDF document may contain any number of elds appearing on any combination of pages, all of which make up a single, global interactive form spanning the entire document Arbitrary subsets of these elds can be imported or exported from the document; see Section 864, Form Actions Note: Interactive forms should not be confused with form XObjects (see Section 49, Form XObjects ) Despite the similarity of names, the two are different, unrelated types of object Each eld in a document s interactive form is de ned by a eld dictionary (see Section 862, Field Dictionaries ) For purposes of de nition and naming, the elds can be organized hierarchically and can inherit attributes from their ancestors in the eld hierarchy A eld s children in the hierarchy may also include widget annotations (see Widget Annotations on page 511) that de ne its appearance on the page; such a eld is called a terminal eld As a convenience, when a eld has only a single associated widget annotation, the contents of the eld dictionary and the annotation dictionary (Section 841, Annotation Dictionaries ) may be merged into a single dictionary containing
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entries that pertain to both a eld and an annotation (This presents no ambiguity, since the contents of the two kinds of dictionary do not con ict) If such an object de nes an appearance stream, the appearance must be consistent with the object s current value as a eld Note: Fields containing text whose contents are not known in advance may need to construct their appearance streams dynamically instead of de ning them statically in an appearance dictionary; see Variable Text on page 533
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The contents and properties of a document s interactive form are de ned by an interactive form dictionary that is referenced from the AcroForm entry in the document catalog (see Section 361, Document Catalog ) Table 847 shows the contents of this dictionary
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TABLE 847 Entries in the interactive form dictionary
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KEY TYPE VALUE
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(Required) An array of references to the document s root elds (those with no ancestors in the eld hierarchy) (Optional) A ag specifying whether to construct appearance streams and appearance dictionaries for all widget annotations in the document (see Variable Text on page 533) Default value: false (Optional; PDF 13) A set of ags specifying various document-level characteristics related to signature elds (see Table 848, below, and Signature Fields on page 547) Default value: 0 (Required if any elds in the document have additional-actions dictionaries containing a C entry; PDF 13) An array of indirect references to eld dictionaries with calculation actions, de ning the calculation order in which their values will be recalculated when the value of any eld changes (see Section 852, Trigger Events ) (Optional) A document-wide default value for the DR attribute of variable text elds (see Variable Text on page 533) (Optional) A document-wide default value for the DA attribute of variable text elds (see Variable Text on page 533) (Optional) A document-wide default value for the Q attribute of variable text elds (see Variable Text on page 533)
SigFlags
integer
array
DR DA Q
dictionary string integer
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The value of the interactive form dictionary s SigFlags entry is an unsigned 32-bit integer containing ags specifying various document-level characteristics related to signature elds (see Signature Fields on page 547) Bit positions within the ag word are numbered from 1 (low-order) to 32 (high-order) Table 848 shows the meanings of the ags; all unde ned ag bits are reserved and must be set to 0