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</script>The types of variable in Pascal programs have been classified (in chapter 7) as unstructured and structured. The structured types have been further subdivided into elementary structured types and advanced structured types. The variables themselves may also be divided into two groups, depending on the manner of their creation. Those introduced so far have the following characteristics.
| citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 0 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Average | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Average |
