1. INTRODUCTION

2. OBSERVATIONS
2.1. ALMA UDF survey overview
2.2. ALMA data and reduction
2.3. Multi-wavelength ancillary data
2.4. Photometric redshifts

3. RESULTS AND ANALYSIS
3.1. Line search procedure
3.2. Purity and completeness
3.3. Blind [CII] line candidates
3.4. Optically selected [CII] line candidates
3.5. Redshift probability distributions
3.6. Other redshift possibilities
3.7. Continuum emission: Individual sources and stack

4. ANALYSIS AND DISCUSSION

5. CONCLUSIONS