Running example

Write in XPath the following queries for the DBLP application and run them:

1. The PhD thesis of Andreas Neumann

/dblp/phdthesis[author = "Andreas Neumann"]

2. All journal articles with at least four authors

/dblp/article[count(author) >= 4]

3. All articles published in 2000 either at a conference or in a journal that contain the word XML in the title

/dblp/*[year = 2000 and contains(title, "XML")  and 
       (self::inproceedings or self::article)] 

oppure

/dblp/inproceedings[year = 2000 and contains(title, "XML")] |   
/dblp/article[year = 2000 and contains(title, "XML")]

4. The percentage of journal papers in the bibliography

count(/dblp/article) div count(/dblp/*) 

5. The percentage of solo journal papers (papers with only one author)

count(/dblp/article[count(author) = 1]) div count(/dblp/article) 

6. The average number of authors of conference papers

count(/dblp/inproceedings/author) div count(/dblp/inproceedings) 

7. The first author of all papers written by Massimo Franceschet

/dblp/*[author = "Massimo Franceschet"]/author[position() = 1] 

8. The first and last authors of paper with key journals/ci/CervesatoFM00

/dblp/*[@key = "journals/ci/CervesatoFM00"]/author[position() = 1] | 
/dblp/*[@key = "journals/ci/CervesatoFM00"]/author[position() = last()]

9. All authors that follow Massimo Franceschet in paper with key journals/ci/CervesatoFM00

/dblp/*[@key = "journals/ci/CervesatoFM00"]
/author[preceding-sibling::author[. = "Massimo Franceschet"]] 

oppure

/dblp/*[@key = "journals/ci/CervesatoFM00"]
/author[. = "Massimo Franceschet"]/following-sibling::author 

10. All proceedings that follow paper with key journals/ci/CervesatoFM00 in the bibliography

dblp/*[@key = "journals/ci/CervesatoFM00"]/following::proceedings

11. All i elements in the title of a paper (at any depth)

/dblp/*/title//i