Objective: This study aimed to identify the sources of knowledge, the effect of integrated life cycle model of Dalkr organizational knowledge on Knowledge documentation and a model of practical knowledge documentation in state Universities in Iran's central library

Methodology: research method is Survey and it is practical. Sample of the study covering  directors, assistants and administrators in various parts of the central libraries of state universities.community members were 172. Which 113 members was selected  based on the size of the population and Morgan and Krejcie sample through stratified random sampling. Of that number, 100 people responded to a questionnaire and return the questionnaires was 88%. E-researcher-made questionnaire with 100 questions. Its validity was confirmed through 8 out of seminary professors and reliability, according to the average Cronbach's alpha coefficient was calculated 87.45

Results: Multiple regression results show integrated life cycle of Dalkr organizational knowledge was effective on Knowledge documentation and recorded variables, share and evaluate the beta 51/0, 37/0 and -0/28 highest impact on knowledge documentation. The final model consisted of three variables extracted, refine and share the path with the direct effect and 39/0, 34/0 and 27/0 and two variable evaluation / selection and indirect effects and total access path 22 / 0 and 25/0 respectively. The results of exploratory factor analysis resulted in three factors extracted implied knowledge of managers, extraction new knowledge from sources of objective knowledge and resources of  objective knowledge to web mining  and Data minig and the total was 35/63% of the total variance explanation

Originality/ value: This is the first study in the field of Knowledge documentation in  public universities in Iran's central libraries to model of practical knowledge documentation