Abstract
The study highlights research through online databases of the Dissertation & Theses Global database. Pro-Quest) by means of topics headers on university theses in the field of information and libraries in order to identify the most prominent thematic trends covered by the rule on the one hand and the extent to which they make available the full texts of university letters and prepare the messages covered on the other, Because of the importance of this aspect of the study in assisting researchers in preparing and citing their university letters, It also identifies the most prominent objective trends of these messages in the field of libraries and information worldwide. They can be used at the local or Arab level to prepare new studies that apply to our communities.
The two researchers relied on the prescriptive curriculum and the study concluded that the number of university theses (doctoral thesis and master's thesis) completed in the Pro-Quest database) amounted to more than 4 million theses and letters as of the date of completion of the current study. The rule also provides the full text of university letters to more than 2 1/2 million university letter addresses in various forms of dissemination (paper, microform, electronic copies) .
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