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Parameter entities z/OS ISPF Dialog Tag Language Guide and Reference SC19-3620-00 |
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Parameter entities allow you to place multiple entity declarations within an external file and refer to them within a source file. To embed the entities into the source file, you must declare the external file as a parameter entity. A parameter entity is identified by a percent symbol (%) following the term "entity" and followed by a space and the entity name. See Entity declarations for the syntax description. You refer to a parameter entity within the DOCTYPE statement by preceding the entity name with a percent symbol (%) and following it with a semicolon (;). This embeds the parameter entity file and allows its entities to be referred to in the source file. For example, we've declared all of our entities within an external
file called SYMBOLS. Here are the contents of the SYMBOLS file:
The conversion utility locates the parameter entity using these rules
for entity external files.We can embed the SYMBOLS file into the declaration subset of the
source file with a parameter entity declaration within the DOCTYPE
statement. As long as we declare the parameter entity and refer to
it properly, we can use any of the declared entities in the external
file in the text of the source file.
Figure 1 shows the formatted result.Figure 1. Parameter entities
Parameter entity names must have these characteristics:
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