  The 7 and 15 um observations of selected fields in the Galactic Plane
obtained with ISOCAM during the ISOGAL program offer an unique possibility to
search for previously unknown YSOs, undetected by IRAS because of lower
sensitivity or confusion problems. In a previous paper (Felli et al. 2000) we
established criteria of general validity to select YSOs from the much larger
population of Post Main Sequence (Post-MS) stars present in the ISOGAL fields
by comparing radio and IR observations of five fields located at l +45 deg. The
selection was based primarily on the position of the point sources in the [15]
- [7]--[15] diagram, which involves only ISOGAL data and allows to find
possible YSOs using the survey data alone. In the present work we revise the
adopted criteria by comparing radio-identified UC HII regions and ISOGAL
observations over a much larger region. The main indications of the previous
analysis are confirmed, but the criteria for selecting YSO candidates had to be
revised to select only bright objects, in order to limit the contamination of
the sample by Post-MS stars. The revised criteria ([15]<=4.5, [7]--[15]>=1.8)
are then used to extract YSO candidates from the ISOGAL Point Source Catalogue
in preparation. We select a total of 715 YSO candidates, corresponding to ~2%
of the sources with good detections at 7 and 15 um. The results are presented
in a table form that provides an unique input list of small diameter, <=6",
Galactic YSO candidates. The global properties of the sample of YSO candidates
are briefly discussed.
